stein,

I have one of the mini's and I too had a hard time to get it to flat spin. I did finally get it and found that I needed an aft CG and very little rudder. The more rudder, the more it would turn out of the spin. I do use high rate for the elevator, but low rate on the ailerons and rudder. Hope this helps.....if you need more specifics on the exact throws, let me know and I will get out the throw meter and get back with ya.

Ryan