John, my first three versions were bag type setups. One version was an aluminum frame covered in cordura nylon fabric with pouches for the wireless and accessories. The frame was wedge shaped with the battery and distro system in the bottom of the wedge. A bit heavier than my current wedge bag. I didn't like it as well since I had gear and wires hanging on the outside. At that point I didn't have the Hydra system.
Most of my work is from a bag cart, so my current setup works well.
For transport, I made a Dyneema cover for weather and some protection. I talked to both the owner of Versaflex and Portabrace about making a bag. Due to the small numbers of Cantar Minis out there they weren't interested. I have seen the Protogear bags and believe they would work for the Mini. I have seen a number of owner made Mini bags on the internet. My most basic setup is the Mini with a bracket on the side to hold small dual channel receiver. A couple of Sony camera clips to attach to the lugs on the back and away you go.
I have attached that image and the wedge bag based on the aluminum frame.
Please do post photos of your design.