I received an email from the other side of the world this morning. Someone had downloaded the equatorial sundial kit and found that it didn't work in the southern hemisphere!
I should have thought of that when I was making the model, the model is effectively flipped over relative to the sun once it crosses the equator. This means that the shadow will track across the dial from right to left rather than left to right.
Luckily it was a straight forward job to add a second dial for use in southern regions. Same as a before but with the number order reversed. The update model with updated instructions is available to download on the sundial page. If you are a member/subscriber or have purchased the model before it'll be available for free.