TWENTY GALLON TANK!!??? Talk about Iron butt. A guy at work here has a BMW with a 12 gallon tank. Says he can ride 8 hours. I can ride for 1.5 hours and I need, and I mean NEED, to get off it for a while. I have a 2004 Shadow 1100. Anybody ever find a good seat for one? Tried a gel, but made it hurt worse.