We've tested them over the last two weeks. Mark Z ran 17.5 for two races and switched back for the third. He ran a fast lap of 16.2 each race day. I ran Silver can handout motors and ran fast laps of 15.9 to 16.1. The race day I ran 15.9 was a newer motor than the other days. The results are from 11/21, 25 & 28 here:
http://www.hobbyplexraceway.com/resu...ath=2007+Fall/

I'm going to try it myself next Wednesday! I'll be at Novak with mine!!

Tim Ski