First off I am running an Element console. I am running 18 LED parcans setup as 4 dimmers each (RGBA) on submasters. This makes it easy for lighting on the fly. I am looking at replacing my conventional lekos with source 4 series 2 LED. I like the ML command aspect of the board for mixing colours for some shows but like using submasters for running the on the fly shows that come in often. My issue is when I switched over my parcans to fixtures and tried to use the submasters I found I lost true mixing capabilities. If I bring the blue fader to full and then bring up the red fader it crossfades rather than adds and I end up with red not purple when both faders are at full and the red fader doesn't adjust anymore till it is reset to zero.