Ralph,
I think four legs is a better setup from the spreaders. I chose to go to the after lower shroud, lashing a teardrop rope thimble to the wire about 1' down from the upper terminal, which was nice as I didn't have to screw into the spreader. The height hasn't been an issue for us, but we have five legs for our stackpack. It would be nice if it were higher, but then the only option is going to the sides of the mast, which than creates a very narrow slot. With the legs going "out" to the shrouds, it opens up the area for the sail to fall in to.
You probably don't need rings at all; just bend a loop to the end for the after two legs, and use a butterfly knot a bit higher for the forward legs. Go up from the boom, through the loop, and back down, this way it's easy to adjust both sets of leg's tensions in addition to the regular adjustment for the lift. Because we went to the shrouds, I chose to lash a plastic cleat at a deck-adjustable height to the same shrouds, so the lazyjack goes up to the thimble, then parallels the shroud down to the cleat. Wrapping the line around the shroud a couple times keeps it from slapping in the wind.
Photo of thimble lashed to shroud.
Photo of cleat lashed to shroud for lazyjack support.
Photo of cleats on shrouds.
Photo of lead of lazyjack up to shroud.
Another option, if you really wanted the lead higher, would be to seize a line to the upper shrouds at the same height as the spreader lift tangs, then either tie/seize it to both the lift tangs, or go around the front of the mast. Then you can seize a small block or ring to that line in between the shroud and mast, thus giving a bigger throat to the lazyjacks while retaining their guiding height.
Good luck!
Aaron
