Was messing with a club member's Evo 45 this weekend at our fun fly. I found that the evo's low speed needle is EXTREMELY sensitive. About 15 degrees from really over-rich to quit on throttle-up lean. Also very easy to turn (didn't need a screw driver), so I think vibration could allow it to loosen.

Motor seems also to be prone to becoming loaded up on start-up. The club member I was helping was often too quick to reach for the needle valve to lean it out, when really it just needed 30 seconds or so to burn out the load-up and come on song.

Nice strong engine from what I saw, tho, and aside from the touchy low end needle, seemed friendly enough. I do prefer my OS 46AX, tho.

J