You know, that's funny... aside from my .61 problems, one of the guys I fly with (2slow's brother, as a mater of fact) is having lots of problems with his Evo 1.00. He's got it in an Ultimate, and he cant get it to run hardly at all. I'm like you, the only reason I bought the Evo .61 is because of the sucess I had with my .46. That engine runs VERY well on my LT40, and I just assumed the .61 would be equally well running. Well, you know what they say about assumptions!