I got inspired to do this after i printed the tupper ware holder from https://www.printables.com/@HaughtyGrayAl_244071. The thing is great, but even the small lid is to big for my taste. So off to Rhino I went and designed something similiar. The current version is good enough for 10'' tablets (in the pictures there is a Boox and a wacom tablet in it. Stable enough for those, but for a 12.9 tablet you would need a bigger base.