I tried several foam and air cushions to improve the comfort of hand climber..finally found one..(a real lightweight, 2" thick, foam, camo covered with two buckle straps..pad) it's about the same size as the seat and I can sit on it for half a day in comfort. Got it at Basspro and just strap it down with the top part when carrying stand. This is it except that it's got a cover with straps..
SEAT