Parameterized Tool Holsters

I found that a bunch of the tools that I carry in my Think Tank Photo FPV Airport Helipak Backpack for Quadcopters kept slipping out of the handy elastic bands because they were too thin. Often times, the tool I was searching for was lost in the bottom of my bag.I decided to to ahead and create customizable thing for both my backpack and other sorts of similar things. A 3D-printed holster to fit the elastic band with enough gripping ability to hold the tool inside the holsterThis should work for