Jib furler, DIY, PVC

I am researching building a budget friendly (ie cheap) roller furling jib system from PVC - entirely for convenience. I am visualizing a pipe over head-stay system. I have found a online references on blogs and forums for other boats, but not the day sailor. Has anyone out there tried to do this on their boat? Any and all suggestions and advice would be welcome. Questions include:
1. pipe size, 1/2 vs 3/4"?
2. how to create a spool for the furling line? So far, best idea for a spool that I have found is two 4" round PVC electrical box cover on pipe sandwiched between connectors.
3. how to route the furling line to the cockpit?
4. what size line to use?
5. Biggest question for my boat is whether there is even enough room at bottom of fore-stay for furler spool.
1. pipe size, 1/2 vs 3/4"?
2. how to create a spool for the furling line? So far, best idea for a spool that I have found is two 4" round PVC electrical box cover on pipe sandwiched between connectors.
3. how to route the furling line to the cockpit?
4. what size line to use?
5. Biggest question for my boat is whether there is even enough room at bottom of fore-stay for furler spool.
