I've overcome my initial failure to read the Jtek directions carefully. Who knew the little wheel had to be reversed for certain applications

I've got things shifting well on the stand. Will get this thing on the road either tomorrow pm solo or two-up on Wednesday. On second thought, never try a new "feature" with SWMBO along for the ride. My experience tells me that stoker's have little patience for bad shifting especially when "I'm only installing a new chain" sounded good at the time.
BTW, I am using KMC chains; they're well-priced and my not so local tandem BS has had very good success with KMC. Love the snap-on quick links. Had to remove the horrible chain gunk first and don't tell me that's factory lube. The coating had the consistency of fly trap glue.