Samsung Tablet Case - ReplacementStand

So I have 3 kids and they all have Samsung 7" tablets, so like everyone else out there, I bought some inexpensive cases off eBay that had built in stands. Of course 2 out of the 3 kids broke their stands. So using the one good one as a template, I attempted to recreate the broken parts. I uploaded the SolidWorks files too in case anyone wants to modify it to work with there case. The Blue tablet in the pictures is the factory part, the Red tablet with Black stand was my 1st attempt, the Purpl