Wearable Pi Zero case for 2000mAh battery

I was intrigued by https://www.thingiverse.com/thing:1649799/ but Adafruit was out of the smaller battery when I ordered my parts. This is a version of the case designed to fit their larger 2000mAh battery.

I've included the OpenSCAD file I used to do the way-too-complicated stretching of the original STL, in case someone needs to fit a different sized battery.