Yes the PTS can be modified, but it is major surgery to do so.

The OP has limited experience with this kind of thing, so it would not be advisable for him to consider as a salient point in his selection.

Otherwise the PTS is a very nice plane... however given his experience with the more docile Alpha, without aid, he may be biting off more than he can handle.

An instructor and a buddy box would be a wise move no matter what he gets.