Customizable Battery Case with locking tabs

This is a remix of walter's customizable battery case with the support columns modified to have locking lips on them to keep the top and bottom more securely locked together during travel. I have only printed and test fitted a 2x4 design for 8 AA batteries (STL files included) but nothing else. Enjoy...

All you need to do to customize it is to modify the following lines:

_part = "bottom"; //[top, bottom]

// AA-14.6mm, AAA-10.7mm, 123A-16.9mm, CR2-15.6mm
_batteryDiameter = 14.7;

//