iphone 5s holster

This is an iphone 5s holster with a big clip attached to it. It's designed to hold an iphone w/ one of those super common cases that are all over thingiverse. For an example case, I've included the one I designed the holster around: https://www.thingiverse.com/thing:55366

It uses a regular bulldog clip to provide the springiness for the big clip and needs 4 M3x16 screws to hold everything together. The walls have a couple bumps at the top that will keep the phone from falling out if you t