Heavy Metal - The inlet/outlet radio was no problem. had at least a one to two ratio on the cowl. Recently I switched to using 30% cool power and it has helped to alleviate deadsticks. I'm not sure why that would be but at 15% nitro, the engine wouldn't run worth crap. I think some of it is the prop I put on it. The APC 12 x 7 just may have been too much prop with 15%.