Those who know me know my back is stuffed and I shoot off a bench which I hate. I have a letter from my doctor to shoot on the bench as 2 discs in my lower back are bad enough that I was advised have 3 vertebrae fused which is not going to happen

My problem is bending forward or arching back (shooting off the ground) hurts like hell as bone touches bone. I hate the bench as it wobbles and the ground does not, anyone who thinks a portable bench is an advantage has clearly never shot off one so I want to find a way to get back on the ground again. I am shooting well, really well at the moment but getting on the ground if I can should be the next step.
My question is there anything in the rules re wearing a corset so support my back ie stop it arching too much while on the ground? I have not even tried it to see if it would help yet, just really wondering about options. The other thought is some sort of lump sewn into the mat where my hips are might stop my back arching too much, any thoughts?
If I try to shoot on a mat I get to about the 5th shot and I am gritting my teeth with pain, but there must be a way I can shoot without a bench..
Cheers
Chris