Just wanted you guys to know i have about 5 hours on the .58 and it is really coming on strong. I took my Cadet Senior out yesterday and put it thru the paces , this is my fun fly plane and i am using Omega 15% , and i noticed a great performance improvent on rpms compared to the first few hous of run time. The guys at the field cant believe how low this engine will idle. Just my 2 cents thanks Otto for all your support . Bruce Swartfager Altoona Iowa