fx-CG50 replacement case

My fx-CG50 was sold with a broken screen and without a case as it was lost.

With further use without a case, compression to the screen worsened the screen damage, and is most likely the original cause of the broken screen.

Now that I have swapped the screen from my fx-CG20 to my fx-CG50, I figured that I should exercise more case to the screen, so I modelled this case