When I was down testing the FX1, the hobie tigers had a dog lead to coil up the spinaker uphaul) taped to the boom near the mast luff. I mean a the extendable, self coiling type you see dog owners carrying - eg the dog runs, the coil unwinds, and the owner just presses a button and it coils back - taking the masses of lead back into a cosey hand held device which can be taped to the mast.
JUST LOOKED NEAT
Apparently Mitch Booth turned up with one at the F18 worlds - and all the shops were sold out of dog leads within 2 days
Regards
huw