couple of follow ups
I made my own tailwheel using the drawing on the plans
As for attach the firewall
I put epoxy on the front of the firewall
then cloth around the edges
dont worry about the weight you will need it in the nose
On your choice of motors
I would certainly put it on a spare plane and run it a lot befor you install it in you scale hellcat
bad engines on scale planes usually me no more scale planes
lawrence