A Hone RD has no provision for cable tension adjustment. I thought the simplest solution might be an inline adjustor, and the best place to install one turned out to be here.
A hone RD is a discontinued AM derailleur and had a reputation for being virtually indestructible - partly because its an axle mount and there's no derailleur hanger to bend or break off. Shifting is just as slick as the Deore it replaced.
The chain was swapped out for a SRAM PC 991 (NOT the hollow-pin version) for increased corrosion protection.
This bike is about ready to pack for shipping and I've already started laying out parts for the next one.