@FedericoBorin_877725 I had to drill two slightly larger holes, while the other two fits perfectly. It seems like this small issue was likely due to a manufacturing tolerance on the Arduino itself.
@Marek_2277623 I'm very sorry, the connections were made so that Arduino could fit in but maybe I was too tight with the tolerances
I really like the design, but unfortunately, my Arduino doesn’t fit. I’ll try drilling larger holes into the Arduino board to make it work.