I have the MTW 75cc pipes on a DA100....GREAT SETUP! I run both the MSC 26x10 & 27x10. The 27 definately loads more, but does well. The 26 is no louder, but will rev about 600 rpms more, and the engine seems the breath better and spools faster (torque rolls). My favorite prop for precision is the AM 25x12 3 blade. Adds a little nose weight, is very quiet and gives plenty of pull...obviously there is a difference in opinion here. Some of the performance difference is likely the altitude...the higher you are the better you think you fly. hehehe. Anyway the MSC is great prop.