Honestly, the secondary winches you're planning to install can be pretty much whatever fits your budget. In fact. you will rarely use them the way you think you will, so don't break the bank. My experience is that I'll usually bring the sheet across the cockpit to the windward side so I can watch the luff while I'm tending the sail.... you can't see anything sitting on the leeward side where the loaded winch would be... anyway, I cross sheet and simply use the windward side idle primary sheet winch . So that means you're most likely tailing from the windward side, you don't really need to grind..and the winch is just being used to turn the sheet back across the cockpit. If it were me I'd install standard instead of self tailing winches with a cam cleat on a riser for convenience. Have fun.
