is that when you mount the upper turning blocks on the mast, don't. Mount them on the spreaders about a foot out from the mast. That will keep the lines apart and allow the sail to flake better. If they are on the mast the sail doesn't drop as well and is harder to haul up. I would use small blocks with eye straps that hang below the spreaders. I've never owned a boat without Lazy Jacks and the suggestion that they be set up so you can bring them to the mast is of major importance. I bring the lines through the blocks on the spreaders back down the mast to small cleats which gives you the ability to adjust them and tighten them up after you move them to the mast. If your sail falls off the boom at the aft end then you need another set of trap lines. Moving the lazy jacks higher on the mast doesn't really do much because you would have to move them way up to get any benefit. Trying to get them set up to work in conjunction with raising and lowering the boom is a PITA. Using plastic eyes, wooden balls or brass eyes in place of blocks reduces ware on the sail but introduces different issues like the lines twisting and not sliding so I I've gone both ways and don't really have a preference. Currently I have plastic eyes which have worked for the last 8 years. Again, JMHO.