In the fuselage of the falco the canopy slides on an aluminium tube that lies over a wooden structure on the dorsal fin.To make this first I used an electric device..

Then to give it the right shape i covered the aluminium tube with sandpaper and started sanding.

Here I'm using my sanding machine to finish it on the sides.

The part is glued to the fuselage and the canopy is lying over the tube.This view is from the luggage compartment looking aft.

And then the tube....

The battery compartment in the falco is located in the tail section after frame n°8.Here I'm installing the battery inspection door.

The door is hinged in in the wood.It's important to work the plywood so that the sides of the door are at the same level of the plywood.