I have a Chester 300mm version.
I was going to buy a "damaged-repairable, includes the replacement parts" machine from one of Chester's Hawarden open days (it had a broken foot on one side frame), but it turned out that Chester only had LH frames in stock & the RH side was broken (or vice versa). They offered me a good deal on a new one, so I went for that instead..
Got it home, stripped it to clean off the gunk & deburr the razor sharp edges on all the ground parts, then found on re-assembly that it wouldn't work properly. The holes in the moving bending vee/ guillotine blade holder for the actuating arms were bored out of postion & as a result it wouldn't do all the functions. I took the offending part back,& explained the situation, but Chester had no spares – they arranged instead for the faulty machine to be collected when another new one was delivered. This one I tried before stripping it !
The guillotine isn't great, as the moving blade beam is poorly held back to the main frame & tends to want to tilt when near cutting anywhere the machine's stated capacity – 1mm steel is hard work & the "real" capacity is less than this. It's OK on thin aluminium, but won't touch thin stainless. The bender is OK-ish – it doesn't give sharp corners, but I have not used it much. The rolls work fine – probably the best bit.
It is a heavy little lump & really needs bolting down to a bench to use safely, as you need to swing on the handle to cut and the base is quite short. I have mine G-clamped to an inexpensive Lidl "Workmate", which has worked so far for the limited use it has had – a purpose made stand is on (but probably a long way down) the "Round Tuit" list.. I tried to get clever & bought a second handle on another visit to an open day (the single handle supplied can be fitted at either side), thinking that two-handed operation would make cutting easier. Unfortunately the lever slots are cut in different angluar positions on each end piece, so the levers sit in very different positions !
I sometimes look at it with a view to improving the method of adjustment & support of the moving bending/guillotine blade holder, which I think in requires to be useable, but thinking about it is as far as this has got . So far, not one of my better purchases !
Nigel B