people buy the 33% because its a T version with no flying wires. (2 seater) My buddy has the 40% and loves it to death. Says he would quickly buy another one if this one bites the bullet seeing how he does 5 foot passes on knife edge and 3-5 ft off the ground torque rolls. Radiocraft has a strong product off with that 330 no bad comments about them. I have the 29% AW edge and it has been great to me. I just sold my 33% NIB AW edge to move totally toward the 39% or bigger bird. I think you will be happy with the edge.