Wouldnt a company make a ton of cash and save the modeler a lot of money if they produced a gas engines (not glow) in the 40-90 size displacement range? Seems to me a gallon of pre-mix fuel is 6 times cheaper than a gallon of glow fuel. Some company out there could make a ton of money if they did!! I see the smallest on the market is the 1.3 first place engine, scale that in half and you would have a perfect 60 size engine that saves a lot of money. Just a thought and wishfull thinking.