Get your chortling hats on. I thought I'd make a mounting pillar for my Multifix tool post to mount it directly to the cross slide instead of atop the topslide and thus increase the rigidity of my machine.

One part of my cunning plan was to make use of that heavy insert that comes inside the base of the Ikea "Jarnsno" LED lamp as the base for my pillar. I knew instinctively that this was cast iron, albeit of rather agricultural finish. A quick skim would reveal a fine disk of cast iron which would be ideal for my needs. It all went swimmingly well to begin with. The pillar went very nicely – no grievous cockups and the surface finish is pretty darned good.

Then I got to the last part which is the flat base made from said mystery metal. Anyway, once I'd taken the first "skim", the flaw in the plan became apparent. The stuff is not cast iron at all. Although it is heavy and magnetic, it's not even solid metal. It appears to be some sort of nasty plastic loaded up with steel offcuts and balls. They seem to be magnetic, so not lead (unless the Chinese have invented magnetic lead) but it might as well be. So now I have a pillar but no base.

What a dork. Let that be a lesson to anyone else who fondly imagines they are in possession of a cast iron base from an Ikea lamp. Dammit, I've been hoarding this for several years now and was starting to feel a little smug finally, now that I had found a use for it. Now I'll have to find an alternative solution for the base…
Murray