re: Progress on the Wiring Path

I was happy to find those cut-away couplers! I think the cast/machined versions are made specifically for gas to electric wire fixture conversions, but perfect for continuing the post up higher while allowing "escape" holes for wire at various levels.

They are called a "hickey"

I've only ever ordered parts from https://grandbrass.com 
Fun looking through all the gizmos which can be useful for many non-lamp needs.