My solution
I mounted a double block to my mast, to start the lines aft. Then, not wanting to drill more holes in the boat than necessary, I tied a second double block to the handrail. Now that I've tried it out for a while, I suppose I can take it off the handrail and mount it permanently to the cabintop, but there's no hurry.At the aft end of the cabintop, I mounted two nylon horn cleats. This was a very inexpensive upgrade, and it has been working just fine.O'day 22's aren't designed to give you a lot of space for running lines aft, but you can just squeeze them in. Not a major problem.