Years ago there was a madman sailor/innovator in Sausalito. His mid-twenty foot sloop deck and cabin top was riddled with various holes where he's moved the mast around, he tried a mizzen mast and even a Felucca- style rig. He must have had a warehouse full of "booms" and even had a version of Wylie's wishbone boom at one time. For a long time he had the boat rigged as a "staysail" sloop. The shortened mast was at the transom with a "forestay" down to the stem. The sail was a jib hoisted horizontally and sheeted to the cabin-top mainsheet track. He adjusted the sail by moving the mainsheet car. It actually worked fairly well when reaching up and down the Sausalito waterfront where it was pretty much "self-tending."