What kind of buttons did you use for the sound fx box?

[Spike]

The button tops were made "in house", you can get the cut file for that here:

http://www.spikenzielabs.com/SpikenzieL ... rawing.pdf

The actual switches where purchased surplus, so I don't have a part number. But, they are Alps brand. The switch body part that goes through the panel is around 0.54" square.