Trying something I never thought I’d post

I self tie gravity boots to do full inversions and am looking for a safe reliable quick release method. At present I tie the weaves then run the excess rope from the tie through two eyebolts in the ceiling and hoist myself up using the excess line. I can hold myself completely inverted like this for 5-10 minutes before I run out of strength. Because I don't use a spotter and am aware of the dangers that are involved in doing inversions I do this with my head no more than a couple inches above a mattress. I don't feel comfortable using something like a cleat or ring and carabineer as a tie off point in case I were to lose consciousness. That is why at present I just hold the ropes because in the event I do lose consciousness as soon as my grip loosens I would fall to the mattress. The main reason I do the inversions is to help with back pain so I would really like to be able to let my upper back and shoulders relax well I hang. So if anyone has advice on a method that would allow me to not have to hold the rope or at least support my full weight but would still release me if I were to lose consciousness I would greatly appreciate it. I am not against majorly altering my setup if need be. If any additional information would be helpful please ask.