As I mount the gear, it's face will be flush with the other side of the wall, and it's backside will stick through, just above the copper bus bar/pipe, giving me easy access to the common ground.
I also wanted the first ground rod to be as close to the operating position as possible. Since this wall is 4' back, to run my strap from the pipe to the ground rod up (or down) and over to the wall, then to the ground rod outside, would have meant at least 15' of strap before hitting ground. To avoid the potential issue with a long ground connection, I actually drilled a hole in the floor, and hammered in the first ground rod right into the dirt under the house. This keeps my ground connection to less than 2'. From that rod, I'll then tie to the one outside (which in turn I will connect to the main electrical panel's ground rod.) Some self-leveling concrete caulk, and I'm ready to add the straps.
I still have a lot of work to do, but it's certainly fun being able to finally work on the shack "infrastructure" now that the living space part of the room is done!