Karver KB6 here

Has anyone ever played with furlers on single handers? It occurs to me that with a furler and a modified retrieval setup. You could hoist the kite as you approach the mark (from Trap with little load), and simply grab the sheet and pull on it after bearing away, effectively allowing a set as fast as the 2 man boats. At the bottom mark you would furl the kite (again quicker and easier than dropping) get around the mark, get the boat going then drop the furled sail (similar to what you see on the big boats but with some form of retrieval rope). It would take some thought and setup but if you got it right you could eliminate the biggest hole in single handed performance.