I currently have the launch pad sofa which says it holds 1200lbs but it is very hard to fill all the way up, so I think there is problably around 1000lbs in the back and around 300lbs in the front. I'm thinking of getting 2 of the 750lbs Sumo bags for the back that would give me 1500lbs in the back. I'm big dude so I need as much wake as possible to get some air. Please give me any suggestions or ideas because the sofa is kind of a pain to use.