I am finding more out each time I visit the boat. It has an interesting type of mainsheet system: it uses three bails near the middle of the boom. Apparently one end of the sheet ties to the middle bail, runs down to a block attached to a pad eye on one side of the cabin top, back up to another block attached to the next bail, then down to the other side of the cabin top to another block, back up to the bail closest to the mast and down to another block at the mast base, over to a turning sheave and finally ends up at a rope clutch. Seems like the long way around the barn, to me. This is one system. The other system uses an end of the boom block down to an eye in front of the wheel steering. Admittedly it does keep the mainsheet out of the cockpit and that is worth something, but a cabin top traveler seems to me to be a better solution since it also allows one to travel the boom in or out. Has any 281 owner made a modification like this?