I just briefly discussed this with hubby, and he was thinking shimming the tank to make up for the existence of any tack strips in the rear would be preferable from the "kids in small spaces" as well as the aesthetic perspective. I'm not sure if that's feasible with this stand though?
I'm embarrassed. I didn't come close to considering mounting my tank with this degree of precision. It's the same size as yours MC, which means about 1000 pounds+ when loaded with materials and setup. I'm suprised that the two very strong young men ($50/per tip) who brought it in didn't suggest I take the install more seriously.
Good fortune with this endeavor, MC!