Hi BusyBear
Here are the wires pulled out of the coro and set on top. As you can see it keeps the wheel from moving forward and back, and running along the sides prevents teetering.
The main gear picture I just drew with a magic marker where the wire is below the coro.

They work really good in the fluffy snow as well as everything else. After dorking it into the ground and busting the 10x6, the only prop available was a 10x7. That speeded it up just enough to pull the front of the ski's up during flight. It was quickly rendered by shoving a couple of pieces of wire in the coro for strength. I wouldn't suggest these for a 60 size without reinforcing the coro like that.

Spanky