A lot of us here on the portal own a RTT, some get used more than others. Does anyone ever wish their mattress was just a little more comfortable/plush? I have had vast orthopedic injuries and a RTT is what saved me from giving up on back country camping, only now my hikes are shorter and I sleep on my roof instead of the ground, it's a fair compromise! However, I still wake up with lower back pain and sore hips, no way near as bad as sleeping on the ground though. Has anybody done any thing to increase the comfort level of their RTT mattress? Ideas, Pics?