Enclosure issues

One of the main issues I've been having with this box is the sliding part. The main issue has been trying to make it have less force to push it in as I want it to go in like butter as well as having a stronghold.

EnclosureJPG

The new enclosure unit uses less of a wall to save print time but all so has more infill so that it doesn't break off. 
Enclosurev2JPG


Enclosure2JPG