@Prof Shadow:
Don't worry: those little yellow/orange rectangles are mechanical relays, so there is some clicky-clicky action during use: one clicks once per ring, the other clicks going into/out of hold.
@ChrisRR:
Sounds great -- have fun at the show with the board!
My advice: just keep any metal from falling on it or possibly getting under it, or it'll be a short demo, lol.
If you decide to mount it to a board (feel free to), either use standoffs or use a trick I sometimes use when I don't have those handy; cut the rubber insulation off a round 3 conductor power cord/extension cord, trim into 1/2" little cylinders of rubber, and use those as standoffs.. works great. Compresses a little when you tighten the screws down, but stiffens up into a sturdy structure.
