Rusty, I thought you - and others - might be interested to see what my S.61 is doing so far with a tuned pipe. I won a NIP ABC P/L set off the auction site and replaced the used ringed setup.

Here's my latest post:

http://www.rcuniverse.com/forum/fb.asp?m=8687475

It's an impressive engine. Keep in mind that APC props are a heavier load than MA blacks, for example.

David