3-Gang Electrical Bracket for Drywall - @claylinco generously made some variants and mods to the single gang file. There are now 2, 3 & 4 gang brackets! “I've modified it to have center markers and holes to mark the cut line on the wall.” Thanks cl@ytr0n!
Designed to work with two 1.5-inch drywall or wood screws.
Run the screws in and out of the clips a few times to reduce friction.
Don't overtighten or use a power driver. The excess torq may crack the print.