Great mixer with one design flaw. Master Inster button over master knob? Why? It’s easy to nudge the master knob by engaging and disengaging this button, resulting in a huge volume jump.
The master insert button should be placed below the filter knob. In the same row as CUE buttons. Or at least under the LF knob in the 3rd channel, over the ON button. Or instead an ON button (which is not that important, as you could just switch channel choice at the top).
I use the master insert button a lot, and putting it close to the most important knob on the mixer is just bonkers for me.
Besides that, the mixer is great!
PS. I wish for a 2-channel, 2-filer version in the future. I could even sacrifice this whole master insert thing just for the second filter knob (for each channel).