CR 123 Battery Storage

Ive been wanting to store my CR123 batteries in my battery storage box but they're always flopping around in there. So my son and I came up with this design to use a D cell battery hole to store the CR123s. Works pretty good. Stl file provided.

My 10 year old son took all the measurements and designed this model in SolidWorks. We had to do one revision to make all the tolerances work just right.