Duraplane trainer 20 stall problem
 

I have a duraplane trainer 20 it flys ok but in a turn sometimes is seems if you bank it to far it well stall and go into a spin. I have been able to pull out of the spin but just before it gets to the ground. Has any body had this problem with a duraplane. I built it four channel. Could it be do to to much control movement or cg. in wrong place? Any help would be appreciated.

Duraplane trainer 20 stall problem
 

Sounds tail heavy to me.