I'm using a mousse can pipe built from a Macs header and a 2"x10" aluminum hairspray can. It cured the mid range and flame out problems I was having with the stock muffler and made the ST 90 run good enough for use in the UCD. But it took a lot of experimenting and tinkering to get to this point.

Here's the URL of a thread I started about a year ago about using a MCP on a ST 90. Only m.gramling persued using a MCP on his ST 90, but he gave up after awhile.

http://www.rcuniverse.com/showthread...435&forumid=21]