Dual C Battery Holder

I found a dual C Battery Holder on this site, but it took 6 hours to print a pair and consumed over 100 grams of plastic. I needed something more economical that would print faster.
I designed this from scratch using SolidWorks 2013. The part file is included. A step file is also included if you don't have SW.
This will print in ~ 1 hour and consumes 20 grams of plastic.
The holes are only 1mm and are meant as guides for the drill bits. Use whatever you have handy. If you need to make chang