Are the cases metal? I tried several other magnets but these worked the best. Might need to use one in each corner. If the case is cardboard, mounting one to the wall and taping another in the case will damage the case(but provide a very strong hold).
https://www.amazon.com/gp/product/B071ZKQ2X5/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I got a bunch of these and find endless uses for them. They excel at finding nails in old wood and locating screws or nails in sheetrock. Two of them easily hold my pistol hanging from under the top of my desk.
I use "Neodymium Magnets with Hole." I prefer to put a hole in the wall for peace of mind. If you can't damage your wall then do go with Command Strips!
Easy to find. Rare does not equal rare, lol.
DIYMAG Neodymium Magnets with Hole,30LB Pulling Force Strong Permanent Rare Earth Countersunk Hole Magnet with 10 Screws for Refrigerator,Cruise,Curtain,DIY,Science-1.26 inch x 0.2 inch, Pack of 10 https://www.amazon.com/dp/B071ZKQ2X5/ref=cm_sw_r_cp_api_glt_i_QXA0CY95JT8RBP6H1522
That should work fine.
I use these:
https://www.amazon.com/gp/product/B071ZKQ2X5
They don't mark the wall, I can always find them because they stick to everything in my tool pouches and my truck, and I can tie a string around them. Finding the first drywall fastener in some walls can be vexing. After that it becomes easier by measuring standard stud spacing and hoping that the drywall fasteners align horizontally (they usually do). But with a magnet on a string you can swing it gently like a pendulum to cover a large area quickly in a search pattern.
These are the magnets I'm using and are extremely strong:
https://www.amazon.com/gp/product/B071ZKQ2X5/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I used to have it just drop into a bucket on the floor but with my opener standing height it might have been too high and it would sometimes bounce out and roll everywhere. Now that I think about it, I could just glue one of these magnets to the bottom of the bucket and it'll prevent that.
I know people have been driving screws through their Oculus sensors and that seems to work just fine but I had these magnets for another project and decided to give them a shot. They work great and are a more elegant option. It's also dead simple to remove (if that's of interest to you).
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https://www.amazon.ca/gp/product/B071ZKQ2X5/ref=oh_aui_search_asin_title?ie=UTF8&psc=1
DIYMAG Neodymium Magnets with... https://www.amazon.com/dp/B071ZKQ2X5?ref=ppx_pop_mob_ap_share
MIKEDE Strong Neodymium Disc... https://www.amazon.com/dp/B08K2S5M4N?ref=ppx_pop_mob_ap_share
I use the neodymium magnets, they work great.
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If you do not want to send it back, you can get some countersunk magnets instead of using the mounting stuff that came with it. I have dimpled walls, so it kept falling off on me even though there was no damage. Used the countersunk magnets and all went well afterward. https://www.amazon.com/gp/product/B071ZKQ2X5/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1