This is really a great sounding reverb designed by DeadAstronaut at diystompboxes. Go to the original thread to learn more about it. This has a couple of features not usually found in a reverb as buffered bypass with tails and feedback oscillation switch. It also has a unique mix control where you have to adjust the volume control depending on the mix to match effect/bypass volume.
I drew my own veroboard layout and built it with a medium belton brick, but with the decay and oscillation controls you can achieve a lot of depth effect.
This is how it looks at my first atemp doing a silverburst painting.
This is my verified layout. In the revised version added the need to ground PIN 2 and PIN 4 of the brick and removed and unnecessary cut.