Irving: That was probably before my time - although some of the description does fit me

My machine is designed to make a car body, but in pieces using extruded polystyrene. It's also my second machine, but it is smaller than the first machine (which was too big, and as a result too unstable). I'm doing it with a kit car manufacturer.

Wavedinamic:

The time would depend on the complexity of the cut. 0.5mm is a finer cut than I've been aiming for (but perfectly achievable). A very rough estimate is 2.1 hours per side.

Assuming I can get to 10m/min per long run, and excluding side-to-side movement time, then it's 8.4 seconds for a 1.4m run; 450mm wide @ 0.5mm spacing would multiply this by 900, so 7560 seconds, or 2.1 hours. Then it'll need flipping, realignment and then the other side doing. I think the plan was for £10 per hour, so that'd be £42.

However, I won't know for sure until the machine is ready, which should be shortly in the New Year (just a bit of tidying up to do and painting it).

I'm a little concerned about flipping it and making sure it's aligned correctly though - especially for a reasonably complex shape. It might be easier to leave some bits uncut which it'll rest on, and then hand-finish them.