Before messing around with your cg you should definetly try the high rates. It may need a cg adjustment to a flat spin, but try the high rates first. As far as ripping the wings off, doubtful in a flatspin, maybe a blender. If you glassed the wings you should be ok, and make sure that the wing bolts have a washer underneath so they hold a larger surface area. Incase you aren't 100% sure on entering a flat spin, here is what I do: It starts sort of like a blender. Start climbing vertically, then cut the throttle. Put both sticks towards the antenna, so full throttle, right rudder, down elevator, left aileron. As soon as the plane is pointed towards the ground, move your right stick over to the right, so it start going to right aileron. Don't jerk it over, but move it so that it doesn't take more than 2 seconds to get it over there. It should start flattening out, and depending on your throws and cg, you may need to stop before you get to full deflection, or if it wont flatten you may need more deflection. Good luck

Alex