Ken and Hagar,
Have you considered moving one of the halyards (main or jib, whichever suits your limited space arrangement at the clutches) to exit to other side of the mast? It's just a matter of fishing the halyard tail out of another mast exit.
I would ALWAYS want to be able to tension my roller furled genoa halyard with a winch. A winch on the mast works or simpler, a high load clutch/jammer on the mast below the halyard exit with the halyard lead aft to an existing winch. Once up and tensioned, with the mast clutch shut, the RF genoa halyard can be run back to the mast for the season.
I have a horn cleat on both sides of the mast. I also have a Harken cam on each side of the mast, super useful:
http://www.ericsonyachts.org/infoexchange/entry.php?328-Halyard-Cams-on-the-Mast
I used Spinlock T/50-4 deck organizers stacked for 8 lines each side. They are rated for 2200# per sheave with no word on de-rating the top. The bottom of top unit locks into the top of the bottom unit at each bolt which makes it pretty solid. Even a huge de-rate still yields a high load rating.
The reef lines are just outhauls. Mine are 2:1. The loads will be higher than the outhaul because of the higher wind speed (even with the smaller sail area) and you need a winch to get the reef line tight quickly with the sail flogging but the load when the reef is snug is certainly less than the halyards.
Mark