Re: Staysail: Purpose and trimming
Correct me if I'm wrong, but I don't think the C&C is a cutter per se? If that's the case, then what you have is a temporary inner forestay that can be used for a storm jib and maybe a staysail to be flown when reaching with a spinnaker.
It's likely to be too close to the forestay to be used in conjunction with a headsail.
I sail a 38ft cutter (Alacazam) and fly a yankee/staysail combination which is a great rig for cruising.