1 / 1.5 / 2 / 2.5 / 3 / 4 / 5 / 6 / 8 / 10 / 12 / 15 / 20 / 30 millimeters

The sheeting is actually the least of my worries, but I'd hate messing up a set of perfectly laser cut formers with loose fitting spars and what not.

Like I said, I can work around it, and it really isn't a big deal. But a full kit is just easier.