Hi Jeff,
Thanks for the update. Ryan must have been disappointed (and maybe a bit frustrated to have the engine fail at the Nats). I have not run one, but conversations with Matt K before he passed away were positive until they started breaking. We wondered if the engine is just not engineered for the stresses of tuned pipe use in the demanding environment of pattern. Matt was also playing with a 55cc gasser which he liked a lot. Big jump in power, but engine weight was an issue. Lots of choices in electric power, not so much in wet power any more.
-Will