Well i have this Top-Flite arf nobler.I intend to cut off leading motor mounts and make a box 1 3/4X1 3/4 x 1 3/8 deep ,1/8 ply 1/2 balsa 1/8 ply 1/2 balsa 1/8 ply bolted through existing firewall,battery and components hopefully will fit in fuel tank area wich is about 1 3/4x3 1/8x4 7/8. i believe allan hahn and some others have done it simalarly.Do you think firewall will need stiffening ,will this all add up to to much weight.
I have no way to wegh things at this point but your thoughts will be appreciated
Thanks
Ron