The 32 to 39 size engines are wonderful, very powerful and lightweight. Personally, I would build a lightweight version of the Dazzler or Uproar and use the OS 32, Webra 36, or Irvine 39 type of engine, along with a 720 mah Nimh battery and small servo on throttle to save weight. A lightweight mac's muffler or mousse can setup would help too. This will result in a beautifully flying Dazzler that will fly "on the wing" and be a pleasure.

Ernie