Go to his thread, you will see more feedback.
http://www.rctech.net/forum/nitro-of...g-tooling.html
But just to re assure the quality of his work, my brother lost his air filter on a new Speed engine, sucked dirt and lost all compression. He sent it in to Ray to get resized, and over 8 gallons later it still runs as good as the day he got it back from Ray...