Sorry for the lack of updates! I’ve been told that I should add more videos, so here’s a quick one showing the speed difference between using the standard pins and the SPI pins on an Arduino with the Adafruit longstrandtest example. I’ve removed the delays so it can run as quickly as possible, as you can see it’s significantly faster when using the SPI pins.
I’ve got 216 of these units (72 pictured) to fit into the floor, unfortunately numerous delays have meant that they’re still not fitted. Hopefully they’ll be in within the next week.