@thomast_88 It was only after 10mins (probably more) of looking through the logs/dockerfile etc. that I realised I'd overlooked the colon...... the colon that is in the two places you've pointed out I should read things more carefully I guess but if it saves the next guy/girl the time I'd make more of a deal of it
When I first mounted my drive I was trying to browse with MC over SSH - it hung - so I connected to a small subfolder and listing was instant. Connection here is good (100/100). Again, I'm probably too impatient