So, I built the Sproing yesterday using the switch board. Fired up everything with the pedal in by-pass. No sound. Switched to effect on and had sound-reverb working. Went back to by-pass...nothing. Checked the output. Dead short to ground in by-pass. Pulled off the in and out wires from the board and still a short. Removed the switch with the remaining wires attached and saw a solder blob on the rear outer set of switch terminals. Drat! De-soldered the remaining wires and installed another switch without a board. Everything working! I've used a number of these switch boards and never had a problem. I always take my time soldering the switch to not over heat it. But I must have fed too much solder onto one of the positions. I've got another iron with a fine tip. If I can get that tip under the board I might be able to break up that solder blob. This might be salvageable. If the blob were in/on the middle set of terminals I'd be screwed. Gotta say, these little boards are time-savers and neaten up the switch installation.