Congrat's man, you got yourself a sailboat. It looks like you know what you are doing and have the diy skills to beef her up. The things I would pay special attention to is the flexing foredeck, not a good sign although quite comon on cored decks whith leaky deck fittings.
It takes a little trial and error to get use to the roller furler. I got very frustrated at the begining, but now like it very much. Here are few advices :
Usually they do not like to much tension, meaning forget the winch on the genoa halyard, hoist just with hands. Make sure you have good tension in your backstays.
The most important thing is the angle the halyard pulls on the swivel up there. If this is not right, it will jam, 100%. It can be very easy to adjust with the halyard passing in a pulley simply lashed (strongly) to the desired height at the top of the mast. If this isnt clear ill try to take pictures of my masthead.
Don't roll it under tension, it will eventually destroy the forestay (and of course you don't see it).
Never, ever, ever, use a winch to roll your genoa. You will break something.
If it doesnt roll by hand, something is wrong, figure it out.
If you cant roll it and it's completly unrolled, you can drop it and figure out the problem once at anchorage.
If its jamed half rolled (or unrolled), then you can't drop it. Untie the genoa sheets and motor in several 360. Not ideal but better than having a big canvas stuck up there in a blow.
On a broad reach, simply open wide the main sail, it will blancket your genoa and you can furl it easely.
My two cents. Once again, congrats for your boat !