Have a Ultra Stick 40 with a Super Tigre 61 with Macs tunned pipe--Traded motor mount--Put Dave Brown mount and placed servos on the side 11 inches from the back--1/4 oz weight will balance out perfectly--1 oz on left wing to make up for the motor layong on the side--Run 11-7 APC prop and use the throttle back mode when looping--Other wise this is a Scat Kat