And she's running! (and I figured out the tow bar mounting..)

WOOOO, she's all back together, and what do you know.. It runs perfectly!

The speedo is a bit dicky, and it seems there's an issue with switching to the driving light relay, but it's running! Oh, and rego is renewed, so I can ride her tomorrow :)

Figured out the towbar mount - seems the towbar on an '84 K100 is very different to that on a later model K100! Email me if you want pics for your own bike :)