I forgot ... the idea above about increasing the trapize shock cord length is "KEY"

I tie two Harken Double Air Blocks to the underside of the tramp to the lacings at the rear corners .... string the 1/4" bungie from (for example) the "Skipper's trap starboard side, through the hull, then over diagonally to the double Harken Air Block on the port side, around/through the block then across the rear of the tramp to the starboard block, through that block continueing diagonally over to the port hull and through it to attach to the portside Skipper's trap. Repeat for the Crew's trap using the un-occupied pulleys in the double blocks. (origonally I had a bunch of single blocks tie on ... then I cleaned the system up by using double blocks

Harry Murphey