Onboard OD or Compressor, one for neck PU, one for bridge PU (?)

[callofcthulhu]

Are you also running two separate amps on the other side of the Ric-O-Sound?

No, summed to mono on the pedalboard.

 

[40Hz]

No, summed to mono on the pedalboard.

So you're (a) coming off the bass in stereo signals which are (b) going into two separate parallel effects signal chains on the pedalboard before (c) summing back to mono at some point on the way out to the amp?

 

[callofcthulhu]

So you're (a) coming off the bass in stereo signals which are (b) going into two separate parallel effects signal chains on the pedalboard before (c) summing back to mono at some point on the way out to the amp?

Yes.