I don't fly the smaller engines but I did try out the SK .91s and so far have been very impressed, real stump pullers. I got to fool with one of the DLE 55cc gassers today, yes it is a knock off of the DA from what I could tell. I was really impressed with it and some places are really selling them cheap. If you have a problem and need service, well?????
Back in 04 when this was posted a couple of the kids in my club bought the new tower engines, everyone one of them had the air leak in the carb problem, doesn't sound like it has been fixed yet either??