After trying loads of settings and new cables then back to the old cables, I'm back on line, mining @ 30.69GH/s.
According to SlushPool, it'll take about 18 years for my next payout so my current rig is definitely a hobby! So, what did I do?
I still used BFGMiner settings inside Minera, but as a pure guess, selected a preconfigured BFGMiner 5.x (Official) and in the next window chose "BFGMiner - Zeus Miner Generic" and turned on logging and auto-start etc ...
I have no idea why it worked, but it did - that's all that matters to me at the moment. I added my SlushPool details into the pool settings, and now my small rig is cranking again - hooray!
ps: Minera received a small donation as thanks for creating this software