DKflyer, the YS91 would be a very nice choice of engine for this plane. I'm not sure of the weight of the YS, but I can tell you with the Saito 100 I had to add some weight to the front to get the proper balance.
Chris100, I too am looking for some stronger landing gear for the Kangke Cap, and the Kangke Gs300. They are both very weak, I'm gonna call TNT landing gear tomorrow to see if they have something stronger that will drop right in, here is a link to their site:
http://www.tntlandinggear.com/
Daz...