I designed and installed the following topping lift on my M15. The topping lift is a 1/16" stainless cable with small thimbles at each end. The upper end of the cable is semi-permanently attached with a pin at the masthead. A short length of 1/8" nylon cord is tied to the lower thimble. Two small nylon sister clips (WM - page 981) are tied to the cord; one clip near the cable thimble, the other clip at the bitter end of the cord. Another nylon sister clip is lashed to the boom end. When I want the boom held up, the upper sister clip is mated with the boom-end clip. When under way, the lower sister clip is attached to the boom-end clip, allowing the topping lift to hang slack. The use of sister clips on the boom and topping lift allow for easy assembly and disassembly of the boom rigging. Joe Kidd M15 #207 "Poco A Poco"