The At Action Perk is sort of my take on the Harmonic Percolator
This one stays fairly true to the original, though it has an added clipping toggle for Silicon/None/or NOS Ge diodes, along with some minor tweaks.
Tuned for just the right amount of chewy bite and snarl, featuring a National 2n3565 paired with either a Central 2n404a or Soviet 1T308B. These clean up quite nicely with the instrument volume control as well, especially with the diodes bypassed.
There are currently 5 available. All different colors. One glows.
15% off for ILF folks. Just hit me up

https://stompingstones.bigcartel.com/pr ... ction-perk
If you'd like to make your own, go grab a pcb from Alec @ https://maskaudioelectronics.com/