Now the Firewall. It is without a doubt an important piece of a plane. Notice the 8 holes, 4 for the motor mount, 4 for the nosegear mount. I also trimmed the epoxy thrust wedge, added the cut-out for the fuel tubing (I know it's not straight, it doesn't have to be)

And yes, Bob, there's the ring of plywood for behind the spinner.

I consider this part of building the PITA phase (Pain In The A**)