Oh, true, good idea... I'll see. Just finished the Band Enabled flags and will upload new var. I also realised that I never exposed the frequency/bandwidth parameters.For the speed thing, you could use the same approach as I do in VAMS with a single UI.
At the top of the speed/global settings on the left column, you could have a title "Global settings" and once you change the edited band below, you change the title to "Band X settings" but those sliders stay the same and influence the "band X" parameters.