What are your intentions with the boat? Trailer-sailing, or keeping it in a slip? Lot's of folks LOVE their CDI furlers, I found them a royal pain in the butt when trailering. Just complicates the rigging process with all the added weight of the furling gear and the sail. I sold mine,(and the new genoa), and went back to a hanked on jib and a down-haul. Simple and quick.....
Now an idea I've been think of, and might install, is a Harken small boat furler,(they have one for boats up to 25'). Need to install a cable in the sail luff, the sail is independent of the forestay so it's easily removed for trailering or when the boat is left in the slip, all ready has ball bearings in the top and furling drum units so it's very easy to furl the sail, but it's for furling only. No reefing. But I normally only sail with a jib, so I'm not worried about reefing the headsail anyway.
If you insist on a CDI furler, follow the directions and have a new forestay made with a toggle on the top,(requires a slight modification of the masthead casting). Most installations use the factory headstay, and I can send you photos of forestays without the toggle that had CDI furlers and the forestays were close to failure with broken strands and severly bent cables.
I'm just not a fan of CDI furlers, but that's just me, and I know probably more people love them, than those that don't care for them like me.
Welcome to the C-22 family!!
Don