Thanks for the update Pete. I have been VERY pleased with my 58GX. I did richen it from the start and have had no problems. I just switched to 40:1 mix 2 weeks ago and was swinging a 24x10 at about 6500 using a stock BCM pitts. After cutting the rolled tube ends off ... the engine REALLY woke up ... spinning the 24x10 in the high 6700 range.