All the stated suggestions so far are good one in order to get the most out of any airplane. With that said usually on a scale aerobat such as the Edge you uasually have to apply a slight amount of right rudder as you ' Round the corner" to vertical. Reason for this I beleive is that the engine gets slightly loaded and the torque value goes up. Torque is a very broad term and forces that apply here could be P factor, spiral slipstream but for the past decade and a half when speaking to IMAC and pattern pilots of all levels the force requiring right thrust and right rudder has always been refered to as torque.

So try this next time out. As you round the corner to vertical, apply a touch of right rudder and the slowly back out of it when vertical. If your airplane has enough right thrust it should continue strait. Now you get to worry about it pulling or tucking LOL.