Shaun, I am a relatively big guy and now use 4" cushions. I cannot lower my footrest any more. How could I prevent my knees from flopping open and get proper leg rest if I go to a low profile cushion. I would like that, it would make my chair lighter and give me more stability, but I am worried that I was measured for a 4" cushion, something will be out of whack. I use mostly a roho high profile.Originally Posted by Shaun