Here's a great sounding reverb designed by CultureJam, built around the typical Belton BTDR-2 reverb brick. I've laid it out for onboard pots and the BTDR-2 being mounted from the solder-side of the board.
This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.