I fly 3d with no expo and no mixing. On the right plane, this is quite possible. My 3d plane is a wasp-like home-design (profile fuse with thick symmetric wing). it weighs under 4 pounds and has an OS .46 for power. Because of the low wing loading, it is easy to land, even with no expo or dual rates. I use only 4 servos, so no flaperons or spoilerons either. Don't be afraid to do 3d with a simple 4 channel radio. it can be done.