I bought the Evolution NT and the .46NX and now I don't. The pistons work better as a key chain ornament which I later did. They are a pain to adjust, the gaskets like to leak and they don't like closed cowls very well.

Don't get suckered by the cheap price and get a O.S. because they are dependable and put out more power. They also work great if you have a enclosed cowl and can take the heat and humidity better. If you are tight on money get a Super Tigre or a Thunder Tigre. The only thing I would recommend with a Super Tigre is replace the stock carb for a Perry and replace the muffler with a Mac because the Super Tigre is a hit or miss with the stock carb. Mine I had a bad carb and wound up crashing the plane because of it.



Pete