Hi Erik, Ya, I figured he would like to get his hands on it! I am using the Pro Max 480's in it. They have a bit more torque than the 400's and a little less speed. With only three hits, I really don't see a degradation of performance getting hits. I love the gearboxes smooth performance too. The only mod I had to do to the adjusters was to shorten the brass spacer tube to fit in the hull. Everything else was stock.