I have updated to model. 
-Shortened the flap (I kept breaking off in my backpack.)

Remix Rev. 1

I adjusted the space to be -1mm shorter and modified the rubber foot indent(-0.40mm) <This made the model so much more snug! It is a snugger fit.
 

The Print orientation is on its side. 6 walls to make the “flap" solid plastic, and this thing is SOLID! Since I printed it on its side, I will need to sand a little, depending on how tuned your printer is.

I used Sunlu PLA+