Hey Wouter... Give this a try.

Red line is the jib sheet and the broken red line is inside the beam. The blue line is shock cord.

The jib sheet comes threw the swivel cleats on the beam, throew pullies tied to the side stays and then goes inside the front beam where it goes threw a series of pullies pulled tought by shock cord attached to each pull and wrapping around the beam bolts inside the beam.

The idea is to keep the tramp a clean as possible. The kite sheet and main / traveler you can not avoid being on the tramp. All other sheets / controls should be keeped well clear.

Our F-18 and old T did not have any controls come out to the side stays before sucking into the beam. The crew on these boats trap behind the side stay and whilst the front beam is futher away on these boats, the crew had no trouble leaning down and pulling it out.

On the down wind don't worry about jib trim. Just release and go for it. The jib is so small it will make no difference if it is luffing.... The kite is doing all the work. Apparent changes that much also on the downwind that you would have to be continualy trimming the jib to keep the tell tails flying. Concentrating on doing this just distracts you from the main tasks at hand which is steering smooth, watching for gusts, other boats and going fast.

As you come into the bottom mark to drop the kite, the skipper should be on the wire with mainsheet. The crew just before the drop should trim the jib and rotation. After drop the crew should get on the wire, adjust the downhaul, minor adjustments to jib and rotation then take the main.