The different hardware is all really personal preference.

Myself i allways have adjustables on all my traps, mainly because i trapeze so low that i need them to get down there, but along with that im usally changing my height often. When its light crewing i adjust up and trapeze off the adjuster string so i can trim the main from the wire earlyier and move my weight around more. And downwind i need a adjustable on the helms to be able to trap low when the breeze up out the back and get high when its lighter.

There are different options to what you can have.

If you've got the dosh then one of the best systems is the mastrom one, that nacra and hobie sell also, where you have a wrapped aluminum (or carbon) around two sheaves. Then the ring slots up inside it nice and tidly.

Cheaper is to just have a simple 2:1 system like most dinghies have, only prob is that the ring can fall off but then you just need to adjust up each tack.