I did quite a bit of research prior and even spoke to the fine folks at Hercules. Looks great, right? I used 100lb drywall anchors; no way those going anywhere, right? The general consensus was drywall anchors are fine but some folks said no way, attach a piece of wood directly to the studs and screw the hangers into the wood if you can't screw directly into the studs. I'm having dinner one night, looking at (admiring) my guitars when I say out loud "why is the center one hanging down further than the others? OH SH!T!" as I bolt from my chair and take down the one offender first then immediately take the others down. That would've been a fatal drop, onto the bookcase and then forward, neck first, onto the pool table; the headstock would've snapped right off. I'm on my way to a lumber yard, found some nice flamed maple boards that I'll stain and then mount on that wall, directly into the studs, and screw the hangers onto the board. I've got a friend of mine, she's an interior decorator, she says she hangs very expensive pieces of art using molly's.... NOPE. If you can't screw the hangers directly into the studs DON'T DO IT.