Ridgid 18V Battery Wall Mount - Left & Right
After some trial and error, I'm confident this Ridgid 18V Battery Mount will work great. It'll hold 4 Batteries across and is plenty "ridgid" to hold up to daily use. I would highly suggest using super-glue gel, inside the "T" mount holes AND along the joining edges. The "gel" is not as messy and it seems to hold a lot better. A little filing on the "T"s might be necessary.
Joined, these two will span the standard 16 inch (center-to-center) wall studs in your garage, workshop or man-cave. Hope this helps someone. Feel free to use & modify/remix.
These were built in Thingiverse and sliced in CURA. The slice was on-edge, side-by-side, diagonally across the build plate, with supports everywhere. The only supports generated are those for the "T" tabs. Easily removed.