I know that on my TDX5 i was able to have 3 degrees of dump from the chair its self. And the personal who fitted it for me 3 years ago, also made and backrest and cushion for ti that allowed me to acheive another 2 degrees of dump which i need to be stable in my wheelchair. But now i am looking into other wheelchairs and non custome seating for i have developed pressure sores from the seating it currently has.

If it was not for the dump in my wheelchair the seat belt would have cut me during any given spasm. which at times nearly sends me out of my wheelchair even with the dump and belt.