P.S. it seems the new short stroke engine is about ready for market:
http://www.evolutionengines.com/Prod..._content=.60NX
I CAN'T WAIT to see how it performs. If it can run anywhere near an old OS 61 VF or Rossi 61, at a weight of 13.5 oz without exhaust, and for $149, we will have a great option for those of us who still love the noisy planes (but hate dealing with irreplaceable 26 year old engines).