I have experience with one. It ran very well out of the box and produced good power. You can fly one after a couple tanks of break-in. The engine performed flawlessly with no pump or regulator, and it does like to run relatively rich just like other large glow engines. The engine wasn't large enough for a 21 pound fun fly airplane, so it was replaced with a gasser. But the engine would be great for 15-16 pound airplanes. The one I worked on was pulled after a couple gallons had been run through it, and it was starting to produce more power as the break-in process was coming to an end. Be warned that it will drink a lot of gas at full power.