Neat, now I can yell at you when shit falls down instead of just cursing these mounts in general. I hate these things, they often don't install well, fall apart and never hold the weight they are rated for. I've tried a bunch of different types and they all kinda suck. Print me a better studfinder and we can be friends.
I'll bookmark it because I'd rather print one than buy it, but just seeing these raises my BP.
There are some other types for higher loads, but its not about anchor, its more about shitty drywall cant hold any load. If you want to hang something heavy you need wooden/metal plate in drywall or you need a concrete wall 😜
You can yell at me all you want! If you need a hug, I can get you one of those as well, no charge.
I am using some of the mounts now for some pictures, but I can say they are extremely stout, at least the way I printed them. You have to use a hammer to tap them in the last little bit so it doesn't spin. They survived some fairly hard love taps, and once the screw was in, they aren't moving.
They sit 3mm proud. This is not an issue if they are hidden, me thinks. However, you should be able to not use the support ring if it is an issue. (I'll modify a design today in attempt to reduce the amount it sticks out.)
Also, these are intended to be extremely secure and almost permanent. If you want it flush, you can probably pound it in a little more with a hammer. If not, leave it proud and it gives you a little meat to pull it out of the wall later.