Thanks guys. I have had the pleasure of being handed a transmitter where a 50 ripped the firewall loose on an GP Extra 300. The guy couldn't get the engine to idle down so he hollered for someone to help. As soon as he handed me the transmitter the engine ripped sideways and stopped. His kill switch was mechanical and the movement of the firewall caused it to disengage. Anyway I managed to pop it into an inverted spin and get it down. Very little wing and tail damage but the nose was all torn up.

As for the BME mounting. When you mount the dowels do you run lag bolts through the firewall into them or is there another method that is better suited like running the bolts all the way through and putting a nut on them? As for the mounting plate on top of the dowels could that be done with 3/16" CF plate or does it really need to be thick ply like some of the pics I've seen?

Robert