I run my gear (Polyend Tracker, Korg Prologue and now the Syntakt) into my Soundcraft-12 mixer and then into a Scarlett 2i2 to my laptop. Does anyone use the FX send/return on their mixer for 'master' effects' and if so, what do you use? I've been playing with a JHS Colour Box in that way but was curious to see what others do.