catalina topping lift.
My c27 topping lift was a fixed wire from the masthead with a small block at the end. The wire/block end terminated about 2 feet above the boom. A cheek block was attached to the port side of the boom, and 5/16 in. adjusting line was tied to an eye on the other side, run up through the block at the end of the wire, down to the cheek block, then forward a foot or so to a jam/horn cleat. This rig allowed a 2:1 purchase and some adjustment from the cockpit. A longer control line could be run to the mast then back to the cockpit if desired.*Adjustment was difficult unless the boom was right over the cockpit. *When I got a new main with a full roach and full length battens it hung up in the topping lift every time I changed directions. If I ran it loose the topping lift flopped around annoyingly. So I was constantly messing around with this ridiculous device.*My solution was to install a rigid vang from Garhaurer. Life is great, NOW!If your main has a straight cut leech with no full battens, then the topping lift will not get in the way too much. If, however, the main has full battens at the top and a rounded leech (full roach) then the topping lift will interfere regularly so make the adjusting line easy to reach by running it forward and then back to the cockpit.