Automatic chain oilers?

[flynrider]

Anybody use an automatic chain oiling system on their CB?
Which one?
Money well spent? or just spent?

I'm starting to fall into the trap of adding farkels because I can, and found one that meets all the relevant criteria - expensive, functional, simple.

I'd say it's more the latter. Chain oilers used to be popular (and relevant) in the days before sealed O-ring chains.

Given that lubrication requirements changed pretty drastically with O-ring chains, putting an oiler on now would be more like adding a retro looking accessory than a functional farkle (with the downside that it will make an unnecessary mess).