Rubbermaid Shelving & Rivets did the trick. Glad this mixer has USB in and out. At this point, I have 3 sound sources–2 wireless mics and a PC. The mixed sound is fantastic. Add a shotgun mic and get the sound from this sound truck to the SOLOSHOT3 and I’ll be in business.
Of course, there will be shoots where I will use only a portable microphone. The sound truck can be used in post [processing].