Concerning the gear doors' attachment I may be able to suggest an idea though I have not yet proven it in flight (the model is not yet finished) however, it does involve two doors and NO attachment to the wing itself.

I have done this on my T-28 (I'm building it from a very old Pica 79" span wood kit).
I hope the pics will clarify my explanation as well.

I made two doors for each leg from thin ply, and glassed both sides.
I then attached each door to the strut covers, with two screws only.
The central screw is common to the top of the bottom door and bottom of the top door.
This way there is flexibility – a door can rotate relative to the wing surface, if the leg bends fore or aft.

Note also the top of the top door has the edge cut at angles – to allow very good clearance to the wing surface, when the leg bends backwards, and also if I need to bend it forwards in order to straighten it (e.g. after a "heavy arrival"…).

I'm sorry it's not the exact same model but it still is a T-28! and the principle may be the same? Just an idea.