GENERLX:

Just some comments on your efforts.

The TF planes are semi-scale, unless you do major revisions to the shapes and outlines.

You're going to a lot of trouble for a sport warplane.

On the tail retract, if you don't have it on hand just stop until you do, then modify the underbody to accommodate.

Flush main doors are easy. Mount the gear just the least bit higher in the wing, and build the wells with a recessed lip. Make doors from thin ply, attach them to the gear legs, when the gear comes up it pulls the doors into place on the recessed lip.

This does leave the lower half of the wheel open to view, so what do we do here?

Call EMS/Jomar, get a gear door sequencer, and use an additional servo just for the inner doors. Don't bother with air actuation for them, not needed, just adds more weight. Straight linkage to the servo. A micro should do fine.

The lightest method is having the inner doors spring loaded to the open position with a small arm on the inside, have the wheel hit the arm and push the door shut as the wheel goes into the well. This takes some cut and try, you need enough spring to hold the door open, yet not too much for the retract cylinder to overcome.

The angle of the hinge can also have a bad effect on this, the air flow can blow the door shut, or add to the spring pressure holding the door open. And it's not just having the hinge true fore and aft, as the propwash does not go straight, it actually flows a little bit from right to left under the plane - it will tend to blow the left door shut while holding the right door open. A lot to think about.

Repeating myself, a lot of trouble for a sport scale airplane.

Have fun, follow your desires, it's your airplane and your efforts/expense.

Bill.