Spanners done!
Used the shaper for the first time in anger in the process as well.
Photos uploaded.
Thanks for all the suggestions.
Saxalby,
That solution never even crossed my mind.
Well, I did use the filing machine and the shaper with my approach, so I at least made a start in learning how to use them.
Geoff – I must must improve on my stick welding. It's horrid!