Never attach port and starboard bungees of your trapeze system togther. If you do go around the forestay and break the port one, then your starboard side is broken too. Run them seperately, all of them. Make them extra long, using blocks for them to run thru under the tramp. The more bungee, the better it will take the "trip around".
Would this setup be class legal?
Can you provide a diagram of somewhat to have a bigger and better picture. I love how this setup sounds. It would be a really nice setup.
