I apparently have a thing for delay/reverb circuits. I decided to do a true stereo reverb using PT2399. It's based on my Spare Room design, but it takes advantage of of the ability to cross feed the left and right signals and to do some cool cross channel-dependent modulation. It's not a small circuit by any measure. In fact, it may be the most complicated single knob pedal in the DIY world, but it's a fun one. The schematic is too big to post at reasonable quality here, but I put the short demo video below and you can find the technical walkthrough of the circuit along with schematic, build docs, gerber files, etc. here: https://scientificguitarist.wixsite.com/home/wishing-well