Although our buttons aren’t soldered up yet and are only held in place with tape, we found out last night that the height of the button head is quite important for our board game to work.
We dropped the hex playing squares into place, and some buttons clicked fine while some didn’t. There wasn’t much difference (none that was immediately visible) between the two. Except one must have been slightly higher than the other. Luckily that could easily be corrected by adding a small piece of card on top of the non-responsive button. It’s incredible that the thickness of a piece of card could be the difference between a button working or not!