I have "Gorilla Glued" the firewall, filling the front corner cavities flush with the back of the wooden firewall backplate. I am waiting for a break in the weather to maiden it, so it is unproven.

My kit came with an improved non-A-frame spinner that is nonetheless still out of balance - a bit of a problem at 15,000 rpm. Did any of you guys settle on a well balanced alternative like, say, the P51 3" from Tru Turn?