I can’t be the first one to do this, but this seemed like as good a place as any to put the analog signal routing- esp. if I want to use any of the effects chains.

The ideal place would be under the hands of a dedicated, competent sound person… unfortunately the venue doesn’t come with one of those!

All you need is one or two large pieces of spongy packing foam (not styrofoam- you want the squishier kind that is sometimes used to ship larger electronic components).  Mine was almost 3″ thick.  I wouldn’t go with less than 1.5″- if it is, double it up… more thickness = less vibration.

Most bass drums have lug receivers that span the depth of the drum- you will want to carve a small channel in the foam piece(s) so they fit snugly on top of the lug receiver, then rest the mixer on top of the (flat) foam.  The foam should absorb the brunt of the bass drum’s vibration (though I could picture the hardware engineers who designed my mixer wincing at this setup).  I’m using a Mackie 1202-VLZ and it’s weight alone keeps it in place while playing.  Securing it further is probably a good idea, & I most likely will.