Do you have a picture of what you are trying to modify? Not that I would want a cleat either, a cam cleat is best. Not sure I would want a clutch, altho I have to admit, I do have a clutch for how I can operate my 110 and smaller jibs with the way those lines come to the top of the cabin top. I may change this option at some point in time. Not sure I would want a clutch or equal with a main sheet, a jam cleat could/would be quicker to release than a clutch in most cases. Are you sure you do not have a jam cleat?
She drives me boat,
I drives me dinghy!