I found it necessary to stretch the Bixler fuselage 2" in order to accommodate the wire bundle that comes out of the APM 1 while using the electronics tray.

it was not possible to connect the battery with the tray installed prior to the mod, now I can install up to a 5000Mah battery, set the tray in position and then connect the BEC and battery leads.

A 2" U-shaped foam plug made out of 1/4" blue skinned depron on the outside and 1/4" EPP on the inside was used. A foam hatch covers the gap behind the tray.

Flight test showed a small change in CG that was corrected by placing the battery slightly farther aft in the fuselage.