ahicks, It's a KMP Arrestti III, this is a DLE20 using an APC 17x6 with a header and a cannister muffler from Mile High. It fit with no body modifications. I was shooting for ~101/2 lbs but ended up a smidge over 11 lbs. The engine only has about 20 minutes of run time and it certainly pulls hard on the ground and really hauls in the air. Looks like vertical is unlimited ( I was afraid to hold full tilt for more than 10 seconds with the engine on such little time). It originally started quite easily once the gas got to the carb. The only problem is with the idle. It will idle nicely at a low idle but seems to jump from being slightly too fast to the low. I would like to hit somewhere inbetween. Seems like I read about this earlier in this thread. The muffler is supprisingly quiet and the header was easily modified.Will post a picture and some prop data shortly. I just don't want to stress the engine too much. My intention is to try beginner class this fall when the weather get a bit towards fall. This plane is about the smooth and most stable plane that I ever flown. Bob