I use an Orb XF once a year and this year I am using a pair of MAC 600s for the first time. I have the effect I want programmed and working as a cue stack e.g. Cue stack 1. Step by step how do I assign it to Submaster 1 so it will trigger when I raise the submaster 1 fader. Similarly I Then want to put cue stack 2 onto sub master 2 etc. I just can't fathom it out from the manual or a similar earlier post. I know it has something to do with MFFs but that's about it. Thanks James.