When I had more than a couple basses, I had a TC spark mini on my board with a paper ring cut out and taped around the knob. I then gain-matched the input to a target output and labelled where that fell on the spark booster for each respective instrument. When I switched basses, I turned the knob to the preset location and then everything downstream was affected similarly regardless of which I was playing. I mostly did it so my envelope filter would react similarly to every bass, as well as my dirt pedals. Low effort, high reward IMO.
