jboy, 150 for three, eh? ouch...I've been wrong before but I cant see you breaking even. I have a homelite 25cc and its very smooth runner. havent got it tweeked yet but was turning a wood 16x6 at 6500 on stock carb (very small) and baffeled muffler. I expect to get it up to 7400 rpm with a bigger carb and removing the baffels from the muffler. I would like to get a 30cc homey but I wouldnt give much for one new. Used ones work fine. The guts are tough and unless someone ran it without 2-cycle mix in the gas its unlikely to be worn out. Matrix...I've got some pics for ya. How bout a airplane for a ryobi 31cc motor that turns a APC 18x8 wide blade prop at 7600 rpm? It was a free motor with a few tricks that cost nothing to do, a $10 bigger carb off ebay $35 worth of coversion parts form www.wackerengines.com and to top it off, Its on $25 worth of plane built from Home Depot...13lbs +/- hangs on the prop long enough to do one torque roll sound to ya..take a look... Mike