Report as inappropriate

I am going to print this, it looks amazing. But I have a question, I am trying to understand the way you decided all the distances because I am designing another case for a project and I want to take your design as a reference if you don't mind.

Firstly, why exactly 1.35 mm at rear wall of Rpi while the front side has a 0.25mm gap? (I aligned Rpi at the point that screwholes fit exactly). That way the distance becomes 86.6mm between front inside wall and rear inside wall, why not make that also multiple of 0.5 since you can easily do by removing only 0.6mm from the rear side, there is space for that. I am not complaining, don't get me wrong :) I just wonder if there is a specific reason why you made it like that.