Re: Cam cleat placement for jib sheets?
The best solution, also most expensive, is to get self tailers. Beyond that, I think you're better off with the horn cleats you've got. I used them with same setup as yours for many years. The advantage to a horn over a cam cleat is that you don't have to "pull through" the cleat. You just hook the line under the horn and the tension is off. With a cam, you've got to take "one more turn" with the winch as you're pulling the line through the cam. Sometimes that "one more turn" just isn't there. Also, releasing a short length of sheet in order to trim is much easier with your existing cleats.
I think you'll have trouble getting a clean lead from the winch to the cleat on the side of the combing- it's going to rub.
Also, pulling down through that cam is a terrible angle to get any force.
Personally, I'd keep your current cleats in place and save up for self tailers.
1977 C&C 30 Mk 1 hailing from Port Clinton, Ohio