The measuring thingys that I posted a few days back have turned up, and it looks like I've actually got the measurements right! This is one of those things that does jobs that other tools could do much better - but is handy to have around to call on at a moments notice. I've already found the axle/wire identifier useful for trying to find the 1.5mm wire that I know I have somewhere...

I expect it will come into its own when I get round to making buildings, that's what the scale ruler, the centre finder and the scaled person are on there for. Just quick reference rather than precision engineering.