While hoisting a jib on my CDI furler I got fed up with holding the down haul line down taught with one hand while tying knots to hold it in place with the other hand to keeping it from slipping. What I did was: First I added a small block to the D shackle on the drum. Than I attached a shroud horn cleat to the downhaul line the same as you would attach it to a shroud. I took the line with the cleat attached and put a bowline in the tack of jib. Then bring it up thru the block and cleat it off on the shroud cleat. Works fast and easy and it sure beats tying knots with one hand