I'm hanging a heavy, 30" circular mirror with two mounting brackets 18-20" apart so I have two options:
Use one drywall anchor for a screw and mount the other screw into a stud.
Use two drywall anchors and mount both screws into the drywall.
Which one is better for safety and stability? Would using one stud and one drywall imbalance the screws? Or would it make no difference either way?