My PO had purchased a "Home made" Lazy Jack system with PVC loops and wads of shock cord, knots and line. I took me an hour to untangle it and lay it out to even figure out what it was.
It also took about a hour to put it up, using the spreader halyard cord, and it was just a mess.
Looking at various designs I came up with this.
I tried it out this weekend and it works great.
10 Pad Eyes $5
1/8 shock line $5
100 ft 3mm cord $25
6 clips $10
I drilled and tap my boom to install the pad eyes with #10 SS screws.
The Red lines
are the 3mm cord and the blue lines
are shock cord.
The Alpine loops are a very nice loop knot.
I had spreader blocks so I used those, but you could put pad eyes or cheek blocks on the mast. I also had "Aladen" cleats on the shrouds.
Two bonus features.
1. The two main lazy jack lines can be unclipped and used as sail ties.
2. The two unclipped shock lines can be attached to halyards when cleated to the shroud cleat to pull the halyards from banging on the mast.
The very aft spring line is attached and also acts as a sail tie.