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Member postings for Rod Renshaw

Here is a list of all the postings Rod Renshaw has made in our forums. Click on a thread name to jump to the thread.

Thread: Flooding
22/01/2021 12:33:45

Yes, something needs to be done about flooding. In my view, developers have contributed significantly to this problem by building in areas that were traditionally used as floodplains.

Lots of info about waterways in the link, but there is also a lot that could be done to reverse the changes in land usage that have happened over recent years, like deforestation, which have reduced the capacity of upland areas to absorb heavy rainfall and then allow the water to flow slowly into the rivers.


Thread: Coronavirus death stats
14/01/2021 16:33:43

When I started this thread I did not mean to suggest that there is not a very serious problem. The pressure on the hospitals makes the problem obvious, but rather to point to what seems to me to be a difficulty with the definition of a virus related death, which potentially gets more serious as the number of tests goes up. In the early days ,when the definition was devised, the effect would probably have been very small, but perhaps not so small now?

I have no special insight into the internal workings of the NHS but I have collated National stats from numbers complied by large numbers of local observers. One of the most important parts of such exercises is devising a very robust definition of which cases are to be included and which are to be left out.

If the definition is not precise this leaves the decisions on inclusion to the local observers' individual judgements and leads to stats of doubtful value. So I do wonder if the "within 28 days definition "is being used by the clinicians - whatever their individual views on which deaths are "obviously" not virus related..


14/01/2021 12:30:45

The definition of a coronavirus death used by the Brits is a death for any reason within 28 days of a positive coronavirus test. So someone who dies from stroke or heart attack or diabetes or cancer or is run over by a bus within 28 days of a positive test counts as a coronavirus death. There are quite a few more total deaths in England each day than those counted by the coronavirus deaths. So more tests will lead to more deaths being captured by the " within 28 days " rule.

So, suppose for a moment, just for the sake of argument, that the incidence of coronavirus in the population at large is constant or only increasing slowly. Could the large increase in the coronavirus stats be partially or even largely due to the increased number of tests? Discuss.


Edited By Rod Renshaw on 14/01/2021 12:31:34

Edited By Rod Renshaw on 14/01/2021 12:32:07

Thread: Macro-photography
08/01/2021 21:32:56

Keep well Raphael.

I remember your posts during the first wave lockdown and I remember comparing your apparently dire situation with my retired and isolating one. I wondered whether we would hear from you again or whether your posts would just stop, and we would be left to guess the worst.

Good to hear you are still with us.



Thread: Heat Resistant Clear Material Needed...
06/01/2021 16:22:11

Native mica is quite brittle and I wonder if a single point hole cutter, as used by plumbers to cut holes in water tanks might be safer than a punch. This would leave a small (1/4"? ) hole in the centre of the window but this is unlikely to matter in a greenhouse heater.

If there is little air movement in the greenhouse, then a paraffin heater may work well enough without a window at all.


Thread: Aging rubber and plastic
06/01/2021 12:19:13


Useful tip, thanks.

Just re-read this thread ( in lockdown) and it reminds me of a conversation I had with a museum curator about bakelite exhibits which apparently just disintigrate without any warning about 80- 90 years after manufacture when on display in temperature and humidity controlled exhibition cases. She said it was a well known problem and threatens whole collections of 20th century household and electrical objects.


Thread: Yet another scam lathe sale on ebay to be aware of
06/01/2021 11:57:15


Buyer beware, I suppose.

Perhaps Ebay can improve their algorithm to watch out for postings with a remote location, a 24 hour listing, little feedback, a note of urgency and mention of bank transfer etc ( rather than Paypal) If a single posting has all of these elements then perhaps a warning to potential bidders could be added ( like Facebook, or was it Twitter, has apparently been adding to President Trump's postings ) Just dreaming.

I will certainly look at postings in new light now!


06/01/2021 11:20:55

Interesting and precautionary thread. Once one looks carefully at the different elements of the advert one can see how cunningly the scam works, though without this thread I would not have noticed the trap.

I wonder if he/ she really lives in Dunoon or chose to represent him/ herself as being based there because it is so remote?

I do buy things off Ebay but only low value things and, so far, I have not been stung, perhaps it's not worth the effort for scammers to bother with small items.

I am surprised that eBay has not taken action because they have a reputation for taking the buyer's side in most disputes, which suggests they are keen to protect their overall reputation for running an honest market.

I notice the lathe is on sale again with a single £400.00 bid.


Edited By Rod Renshaw on 06/01/2021 11:23:59

Thread: Low temperature casting metal
03/01/2021 16:46:29

Modern pewter has antimony instead of lead.


Thread: Postal Imports ... Notice 143
01/01/2021 18:20:58

Michael, Thanks for the link.

This seems to confirm my general overview above, and makes a distinction between buying directly from abroad (where the seller will collect the VAT) and buying via an "Online Market Place" (like Ebay) ( where the OMP will collect the VAT) I also agree with others who are waiting to see what happens in practice.

One might imagine some sellers being better than others at keeping records and handing over the VAT they have collected, and one might also wonder what penalties HMRC could impose if any non UK based sellers default.

These official links say nothing about delays and handling charges, which are not part of the legal import charging process, but if these are short and not expensive then this change seems to be generally good news for those buying low value items from abroad.

I will wait and see how it goes!


01/01/2021 16:49:04

This is too complicated for me!

Does this mean that, under the new rules from today, if one of us orders something worth less than £135.00 from abroad then only VAT is chargeable, and that VAT has to be collected by the seller in, lets say, China? And the seller has tp pay the VAT they collect over to HMRC?

If so, and if the appropriate paperwork has been completed by the seller, then the package comes through customs etc with nothing to pay and thus no delays or local handling charges by Royal Mail etc?

Does it make any difference if one orders from Alibarber etc (based in China) or from or via someone advertising on Ebay etc., based wherever?

Sounds far too good to be be true, even accepting that sellers abroad will have to increase their prices to cover the VAT which they don't presently pay, What am I missing?


Thread: new ML7 headstock bearings
20/12/2020 14:29:19

My old ML7 has white metal bearings. I don't remember any trace of bronze colour when I last dismantled the headstock.


Thread: Delay to Issue 299
16/12/2020 10:37:48

My newsagent tells me that, by his count, some 75 UK magazine titles have ceased publication altogether this year including some very long established angling titles. I think there are probably a lot more anglers than model engineers so I am grateful that we still have our magazines - even if there are some delays in delivery.


Thread: A Certain Age
14/12/2020 21:08:57

My very elderly neighbour went into hospital for a short period recently and found the staff questioning her about her lifestyle and social contacts etc and trying to place her on a "Fragility Index."

She became nervous that the staff were trying to establish if they should put a "Do not resuscitate" note on her file.

Bit paranoid perhaps? But just to be safe, best to invent some interests and friends - just in case!


Thread: Way Wipers?
14/12/2020 20:38:55

Felt wipers are used on a wide variety of lathes successfully.

If you decide to fit them and have to make your own, then chiropodists' felt ( look on the web) seems to be a good material and less likely to wear quickly than the soft felt from craft shops.


Thread: Not such a Dodgy Lathe on Ebay
14/12/2020 18:42:17

Does anyone know what "Former Member" does or did to merit the deletion of his posts?

Just being nosy!


Thread: Shimming Techniques
14/12/2020 14:47:36

Misread this title as shimmying techniques,

Thread: Have You considered getting a 3D printer
11/12/2020 18:08:34


Thanks for the instructions, but most of them mean little or nothing to me. It's probably laziness but I just don't seem to learn effectively about IT matters unless I am actually shown what to do, almost keystroke by keystroke, and then use it frequently.

Regards, Rod

11/12/2020 17:17:38

I think what most puts me off getting a 3D printer is the thought that my general lack of IT skills would make it difficult for me to use one effectively.


Thread: Drawing Projections
11/12/2020 16:29:50

I don't use the cm much either.

When I went into a school last year I saw young children doing some sort of practical work with card and scissors, and they had been issued with plastic rules calibrated only in whole cm. I asked a teacher about this and she said they were not allowed to use inches any more as they were regarded as obsolete, and the children could not understand anything as small as a mm. I suppose it was a solution to a perceived problem but it seemed rather a poor solution to me.


Edited By Rod Renshaw on 11/12/2020 16:30:30

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