rbgetz

I'm really surprised that the firewall that came with the kit was so thin. only 1/8". it also had a lot of flex. so before I start to build the engine mount, I decided to support the existing firewall on the inside with another 1/4" plywood. I used my favorite circle temple for my router to match the existing inside diameter. I then cut the new support firewall and epoxied to the exiting firewall and then a bead of Aeroepoxy on the inside edge. I can now literally grab the firewall with both hands and shake the whole air frame. Solid. I'll then start the engine mount with a 1/2" ply bolted to the new firewall.