This small PCB kit will fix the bleed between the two channels of the Serge Positive Slew module. This bleed was a common issue in all Positive Slew modules from the era and can now be fixed with this simple drop in PCB kit.
How to install
From the back side of the module place the two 7 pin headers into the right LM3900 footprint. Then mount the Positive Slew Fix PCB onto the headers and solder the PCB to the two 7 pin headers. Once those are soldered flip over the main PCB and solder the kit to the LM3900 footprint. The proper mounting location is shown in the photo. Make sure all words are readable when the module is facing up.