Glad you enjoyed the ride, this is my fourth 5.8, Jakes info is spot on, just make sure your mast is facing straight into the wind when raising or lowering the sail, you really want a non stretch halyard for the main, I use 6mm dyneema which is way over the top for the load but it has zero stretch and is comfy on the hands so you can give it a yank and the ring pops off the hook, then just rotate the mast, you can see from the ground when the hook is free to come down. Definitely worth setting it up right, having the boat too high on beach rollers for some reason causes a problem as well. If you have old sails, well worth unstitching the bottom of the bolt rope, stitch some more rope on the end then pull really hard on your downhaul, it will suck more bolt rope up the sail and give better shape and performance, once you have it set again cut the excess off and put some more locking stitches in. I don't know if you've found these tuning guides
http://www.goosemarine.com.au/downloads/
These guides are for the bow foil big jib
The only addition to righting technique I would add is use a throw over the top righting line and let your downhaul off as well prior to righting, have you tried spraying lube into the traveller balls? Have you checked that your mast is airtight.
Downhaul setup is important you will use a heap of downhaul, on a windy day with an old 5.8 sail I would have the bottom of the sail out of the mast track and nearly touching the tramp


Jeff Southall
Current boats
Nacra 5.8 1703 Animal Scanning Services
Nacra 5.8 1667 Ram Raider
Nacra 18 Square
Arrow 1576