raideron
After reading your post I went back and checked my CG again and I found that I was wrong the first time, my CG is at 5.5 back with the S-100. I don't think my problem has anything to do with to much air from the prop not letting it get flat because I've tried it with all different throttle settings from 0-full throttle and the only result being it spins faster with more throttle. I've also tried the ailerons from 0 aileron input to full input the same direction as the spin as well as 0 to full input the opposite direction as the spin. I've also tried all of this both inverted and up write. It won't even flatten out at the end of a blender, it just slows down but the elevator won't push it flat.

Maybe this particular plane just won't do a flat spin[] It's just frustrating because my last one would do them so nice and I've heard you guys all talking about how well the Do does them.