The parts for the Unicorn circuit board arrived! The circuit boards themselves sill aren't here, of course (cheap shipping from China is cheap and slow). Anyway, I went through the parts I received and, lo and behold, I got one wrong. Thankfully, it was only the switch—I had ordered a surface-mount version instead of a through-hole version. The good news is I can still use the switch. I have corrected the part number and price in the part list spreadsheet. On a slightly related subject, I f...