So unfortunately the shell I made was too thick and battery could not slide in. Sad-face. Its cool, I only blew a couple hours work. I will redo it and correct the mistake..

As you can see the battery is not able to slide in. I did not account for the taper of the battery rack is 1/4 tighter at the base than the top. Sooooo yeah, I hate failing and doing things twice ,but the more I work on Robotics the more I am learning mistakes and stepping stones to success , not failures!