He tests the amount of force required to pull each anchor from the drywall as well. Here is a timestamped link to the results from that test showing rated vs tested performance. https://youtu.be/lHb-Tcvkn7M?t=970
Please just tell us the results, very few of us want to watch the video.
Well, I installed the rack using 1/8" toggles. It seems secure and there’s no wiggle or movement. I’ll let you all know if it holds up.
You don’t have to watch, just click the link and pause the video. It’s at the chart of the results. I don’t know what results you especially want so it’s not worth the effort to explain in a post what a chart can already do. A thousand words and all that.
I’d use Molly Bolts. They come in different screw sizes for additional strength.
I’ve mounted book shelves with them using slotted metal strips. It provides adjustment for the shelf bracket.
I remember in school the maintenance man mounted blocks of wood with toggle bolts. The pencil sharpener screwed into the block with wood screws. There’s a lot of torque on a pencil sharpener. Kids would yank the handle.
A good maintenance man rounded the edges of the block and painted. They looked pretty nice.
This is what you need - https://www.homedepot.com/b/Hardware-Fasteners-Anchors-Hollow-Wall-Anchors/Molly-Bolts/N-5yc1vZ2fkp96iZ1z1r780
The ‘winged’ mollys are ok, but you need to start out with too big of a hole. The above ends up with 4 ‘wings’ you can remove the screw, and reinsert it. Though the molly stays in the wall.
I always cut out a section of drywall and replace it with plywood and then refinish. Never an issue anymore.
If that’s the route you want to go… Use a 3" hole saw on a drill. Drill the 3" hole in the drywall. Slide in plywood or other wood and glue it to the back of the dry wall. And then once the glue is dried, drop in some drywall screws from the front.
In this way, you have a 3" round piece of drywall to patch back in that will fit perfectly. A little mud, a bit of paint and you’re good to go.
I’ve done this to make inspection holes when looking for roof leaks.
Just an update:
Everything is holding up fine, not the slightest wobble.
HOWEVER
As I suspected, the folding arms have found a configuration that works, and I don’t think anyone has moved them in weeks or more. So there isn’t much actual force on them.