I bought a J2 back in October of 2014 and overtime it's just caused me to feel unstable. I am a C7 very active and over the past few weeks I keep getting the feeling that I am falling back in my cushion when I wheel the chair which is a horrible feeling. I have a wheelchair clinic appointment coming up but I noticed the gel is flowing over the front well and on the sides to the back even after I put it back in place. I was wondering if anyone else ever felt this way in a J2? I have been paralyzed for 24 years and never had this issue but a professional from Spinlife told me the J2 profile changed a while back not sure if this is accurate. I had a air cushion for a few years and decided to go back to a J2 and it's not the same and my stability is fine on the edge of a bed just horrible in the chair.