Not a very helpful response from EHX….this is NOT something that is up to for experiment.

You are buffering your signal with the Soul Food, which essentially corrects the increased capacitance caused by the distance your pickups, volume, tone, output jack and cable adds up to and has dumped a lot of your highend to ground along the way. Your Nano Muff and most other fuzz boxes especially with Germanium transistors hate a buffered signal. The same goes for a Wah. If you put your wah after your Soul Food and tested it buffered vs true bypass you would instantly know the effect buffering has.

So for your awesome little board you should turn the Soul Food back to True or run the Soul Food after the fuzz box.

Peace
Maynardo