Bummer, Is the plane repairable or is it toast.

The practice of glueing in servos is used successfully alot in Electric planes, to save weight. I do this quite frequently in some pretty large Electrics (up to 14 lb AUW).

Usually I wrap the servos in regular masking tape and use goop, or GE Silicone. If I have to remove a servo I cut the tape and pull it off and remove the servo. If you use the shrink tubing be sure and prep the tube surface to get a good bond. If you have doubts shrink some tubing over a block of balsa and glue it to some scrap wood and test the bond. Personally I would stay away from servo tape as it does not hold the servo as rigid as the above methods.

It is a good idea to check for loose servos periodically, and after hard landings.

Gordon