I'm running the wood mount right now with a YS 63. I put a layer of 2 oz glass cloth between the two ply beam mounts, and I used short pieces of glass cloth that are about 1/2" wide to help secure the whole mount to the firewall.

I've got 6 or 7 flights on it now with no signs of stress.

Question: Have you guys flown yours at high throttle much?

FYI - I cut the wingtips off as many have suggested. I'll see how that works tonight!

Blender! I knew I forgot to try that!

Mine is 5 pounds exactly before I cut the tips off. I've got two Hs-225BB's and an HS-77 in the tail. It balances at the "expert" position (165 mm back) with the 700 mah battery right behind the tank.