I tried using bungee to raise the boards but its the distance they need to travel thats the problem. To completly raise them they need 60cm of travel which equates to aproamatley 3 meters of 10mm thick bungee per board and they will be loaded with too much tension making them very hard to lower. I have noticed the boards sit directly under the side stay which could save adding the strap under the water line. I could run a pully 200mm up the stay. Has anybody done this or used the stay in this way? pros and cons?

I am tring to keep the tramp clear of ropes so I need the rope for the lowering of the boards to run up the hull and along the front beam and onto the other board. The same setup as used for the 2:1 rudder system.
I am considering running the rope over the top of the board through a mounted roller on top of the ceterboard at a 20 deg angle compared to the usual 90 deg in relation to the board direction, so as to keep the rope running up the length of the hull.
This idea would require less pulleys to direct the rope around the tramp instead normal version which goes stright over it.

Any other suggestions or forseable problems with this idea?
Can you share the wisdom of your setup and why you think its good or bad?