Chad,

Yes, I have read about the need to reinforce the bolt holes and it is obvious just from moderately tightening down the bolts that the firewall material will crush easily. Already I can see how it would disintegrate in short order under actual flight loads.

My plan is to make a very stiff ply triangle made from 3 or 4 small sheets of 1/32" ply, drill the bolt pattern and then install the bolts with red Loctite and some large recessed washers supplied with the motor. I will post a photo when I do this and see what you experienced guys think about the installation.

Thanks much. Your observations are most appreciated.