ive got a sig lt-40 with an unidentified .46 in it and its got unlimited vertical and its about double the size of your pt. If you get that 60, to balance out right its gonna be pretty nuts.

If I were you theres a few things I would do to that plane.

1. Reinforce the spar, my lt-40 has a full length fiperglass spar and the wing is glassed together as wel
2. put a bigger rudder on it. ailerons are your choice. I can hover/torque roll my sig but the rudder is a bit too small and and you really have to stay on it. needs more aileron too.
3. change the wing to bolt on after you have properly rienforced it.

If you are gonna make it a monster, go al the way.