The 100cc worked great but got the bottom of the gear nasty from idling all the time. I just installed a new DLE 55cc with Jtec snuffler mufflers and I am in love. Put your regulators and batteries on the firewall and the balance will be perfect. You can see that my radio gear is under the wing so it is a little tail heavy but it doesn't show up in flight. No more hanging on the nose, but it is more power than scale. Large loops are possible with a good entry with speed. The big beast looks great on knife edge and it will hold it with the 55cc. The DLE 55cc seems more like a 65cc and the snuffler's are so quite it is hard to tune the high end because you just can't hear anything. The bottom of my gear and plane are much cleaner. I am using a Biela 22 x 10 carbon prop and they seem to be great and a great price.