Further clarification:

- The (Shimano) JTek shifter is indexed for Shimano 8sp hubs.

- An inline cable adjuster is necessary and works great.

Maybe a clever monkey could fit a cable adjuster out back at the housing stop on the cassette joint, but really, only inline adjuster is necessary. Should come standard with the JTek kit...

Of course you need to get the end of housing to that terminal cable button pretty close to spec, first.