"orangetrader" writes:
The optimum position would be for the rack to center over one of the studs,
so from there, 12" each way I cannot reach two studs. I can only screw into
one stud so the horizontal pieces will not be too secured. Not sure if I am
making sense.

O
PLEASE DON'T TOP-POST - it makes it hard to follow the thread.

In answer to your concern, you could just extend the horizontal rails
beyond the width of the rack so that they cut across 2 or more studs
(and are centered on the rack if that is needed for appearances)