I have just finished building a Kange Cap, I really don't even know if kangke has the right denomination for this plane, since they claim it is a Cap 232 while the color scheme and everything is related to the 231 EX. Anyway before buying the related items for the plane I read several posts on the plane and I thing I did good doing this first. Apparently this plane was found by everyone tail heavy so a lot of weight was to be added if you used the recommended engine sizes. The plane can take (apparently) a .90 engine, but if you do a little searching you can see that many people are installing bigger engines to avoid adding weight. I personally installed a TT 120 Pro with pump and pitts muffler. Although I have this big engine up front, and I have less weight on the tail because I used a dubro pull-pull on the rudder, I am still tail heavy, not much but I still have to put the battery pack, a 6V 2000Mah, forward of the CG by at least 2!QUOT!. No added weight other than that but this plane is tail heavy, A LOT. I haven't tried it yet since I am waiting for some hi- torque servos for the rudder and the elevator. I think it is a really nice plane, and by the way the total weight of it is about 8.8 lb so I am a bit heavy but I can't seem to understand how could I have less weight respecting the CG.