RE: 3D Help Needed!!!
Tip to the side while doing what? Torque-rolling?
If so, and it always goes to the left/right, you need to add/subtract right thrust respectively. If you don't have enough rudder authority to recover either: 1) Too nose heavy 2) Too small rudder 3) You wait too long to fix the off axis attitude. Of course, don't ruin the normal flying charactersistics by moving the CG so far that it is impossible to fly.
As for the reason that right thrust is needed... the wash comes off the prop in a spiralling slipstream... it spirals clockwise when viewed from behind. Whe it gets back toward the rudder, the bottom of the slipstream (moving from right to left) has nothing to hit. The top of the spiral (moving left to right) hits the rudder, pushing the tail right and the nose left. Right thrust helps stop this.