Lazy Jacks

Hey All - Dennis Carlson and I got into a conversation re Lazy Jacks in the thread under roller furling. I have an old LJ system for my Scot that I have not been using, but may well install next season. Do any of you have rig plans for LJ's and do you have any comments on them?
Cheers,
John

Ngulule
Customflex #1554