First I want to start out by saying my mom has RA and I am sorry all the pain you have already gone though. I need some questions answered so I can give you the most best answers. Did the spine doc say how much your L5 is moving forward? There is 5 grades of moving for your information. I treat football players with spondylolistehesis and the football players are able to play without pain. The question really comes down to if the spondylolistehesis is unstable affecting leg weakness or bladder symptoms.