Hey Mix, you're running the OS 1.08 also right? I have put in alot of right thrust so far, and cuz of the torque it still wants more! LOL.... I have also been goofing around with a ton of different props, including your cut down 17" Zinger, which worked quite well, but found this plane absolutely LOVES the APC 16x4W prop. I am also almost at 6" back on cg, and am thinking it could almost go farther. It's flying good, and I love doing tailwheel first landings.