Here is a possible location for the bay doors servo. Might put an HS-81 small servo somewhere in there beside it to operate a release mechanism or something. Still like the idea about enlarging the bay from former to former. Might be able to drop the servo down closer to the bay and extend it's shaft with a 13 inch long 1/4 dia. wood shaft or so from former to former and put a plywood arm on each end of with four wires to operate the doors. I would like for the doors to be able to support some weight however. If the servo actuation was 180 degrees then I believe I could orient the linkages such that the servo wouldn't be straining from the cargo weight except initially during the drop when arms come off of top dead center to open the doors.