Love fully adjustables on cats, i find that when helming i come out of a tack grab the ring, hook on and just slide my hand a little bit up the string to keep it hooked on and then go out just holding onto the string. I find it's the quickest way, no fiddiling around finding handles or disks or fidiling with hands to hold sheetes ect.

And as a crew up wind i hook on when out there, and downwind i do the same as when helming