I am at at total loss as to this beefing up the firewall discussion. The Ply is behindfirewall is behind the fiberglass fuse's firewall. Once you install blind nuts and motormount, it can't possibly go anywhere.
I'll bet that the play firewall doesn't even need to be glued to the inside of the fuse. Now, I'm sure it is, but I would certainly see no reason to add even 1 gram of weight in reinforcement.
Think about it. I now a lot of arfers like to beef the firewall on the typical ply-to-balsa type of construction.
When I see discussion of this reinforcement, it makes me wonder if it is a post in an incorrect thread, or the person actually has a Lanier and is dislexic or something, thinking Lancair.
Pllease explain why you would have any need to reinforce the firewall.
Thanks,
Paul