Really enjoying your thoughts and pics of your home projects. Nice!
So - this one looks pretty good,
https://barn-door-tracker.co.uk/
(Reason I like this one, is because for a non-technical guy, I like fixed measurements and instructions.
)
If I wanted to make an Aussie version, would that hinge be the right way? (No Polaris, Southern Hemisphere).
Might go to some fleamarkets and see what bits I can get.