Here is a picture of the firewall installed.

I made sure I gave it about 3 degrres of downthrust and close to two degrees of right thrust.

Twin Flyer, yes 1/4 inch plywood might be overkill bit it is my first conversion. Is there a rule of thumb when choosing plywood thickness vs engine displacement ?

My calculations tell me I might need some extra weight in the front because of the short nose moment of this plane. If this turns out to be the case then the extra weight of the plywood will pay off.