Appears a bit thinner than I would like, but overall printed without defects.
Can you make one that is a bit thicker and has holes for small magnets underneath?
Unfortunately I lost the original design files so I can’t make those but my friend had made what he calls a speedy tech Matt that can hold what you have discribed.
https://makerworld.com/models/135336
This link will take you to the page where you can download his work. I would recommend v1 and it is stronger but if you would like he also have a v2 but it is honestly way to thin.