New to the PBC and have modulation pedals on loop 7,8 & 9 (chorus, phaser & flanger) and delay on loop 10. My observation with PBC mixer is that in general parallel allows more of the original signal to come through and in series effect is thicker. So for lead tones that have a mod and/or delay I use parallel so source tone comes through and for pure mod chain, I use series to make it thick as intended. My delay is a Chase Bliss Tonal Recall RKM and has Mix dial and midi controllable presets so I can use Series and lower mix by preset and keep it in series if I want. None of my mod pedals have mix or preset ability so I use the parallel and series at PBC preset level for them. What are you guys doing with the mixer on PBC for series and parallel?