Jens Pind Linkage (JPL) is a tight spiral weave that does not unwind. Its construction is just like that for a normal spiral weave; the small aspect ratio is what gives it its unique properties.
Jens Pind Linkage takes rings on the small AR end, with 2.8 - 3 being preferred. Jens Pind can be made with larger ARs, but the chain may turn out too loose and the spiral will unwind. These rings have an approximate AR of 3.4. 20awg 3/32", 18swg 1/8" and 16swg 3/16" should be adequate for Jens Pind.
Metric sizes - approximately 0.8mm wire/2.4mm ID; 1.2mm wire/3.2mm ID; and 1.6mm wire/4.8mm ID.
Old rings are steel and new rings are gold.
Step 1: Make a length of JPL that's 2 rings shorter than the final joined length you want it to be. Make sure the chain isn't twisted at all, and that the two end rings are in the same row - otherwise they won't line up and you'll get really frustrated and think 'Man, why do I bother reading these tutorials? Phong doesn't know what he's talking about! What a doofus!'
Anyway, line the two ends up so they're next to each other.
Step 2: Pass an open ring down through the two end rings on the right side, and up through the last ring on the left side. Make sure it goes behind the left ring in its row and in front of the right ring in its row.
Step 3: Pass an open ring through the two end rings on both sides. It should go above the left ring in its row and below the right ring in its row.