I've started the rigging on the Pup. I've done the cross bracing so far. I've used 28 gauge steel wire. The rigidity helps make it easy to assemble. But it does look a bit thick.
In order to help work on it, I got impatient for working out a way of mounting. So I glued a small #40 nut on the bottom of the plane, roughly at the center of gravity. I then cut few 4" lengths of 1/2" wood dowel, with a small wood screw in each end. So I can use RE magnets to hold the plane on the dowel, and the dowel on my steel work table. Hopefully the nut works with the Omni-Stand I'd like to use. Based on the strong bond with the magnets I've already got, I think there are some other options as well.