
I couldn't find a good picture of the lazy jacks deployed, but here's one of the thimbles I used from the control lines to the cradle (probably not the right term, but close enough). I thought about splicing an eye in the other end of the control lines just below the cheek blocks then attaching a single line down to the cleat. It would make it easier to deploy and stow, but you wouldn't be able to adjust each side individually (for better or worse).
I got the basic design from a set
http://www.porttownsendrigging.com/ sells. I spoke to them at the Seattle boat show a few years ago and he sold me on the design then said "you can probably do it yourself, save some money, and learn how to splice", so I did.
Spliced thimbles seem to work best, because they have very little for the sail to catch on but still provide a low friction surface for the lines to run through while deploying or stowing them. Knots can also catch and come undone then you're left climbing the mast to retrieve a control line, but they do provide the ability to adjust the system. If I had to do it over again, the only change I would make is using small diameter dyneema for the lower section. Even easier to splice, less friction to rub against the sail, and you can use a really small diameter line (I had to increase the line size to get a double braid I could splice an eye into)