OpenAPS Pi Zero + Explorer Hat Case with 1 or 2 Batteries

This is a case for a Pi Zero plus Explorer Hat to run OpenAPS. It's intended to use 2000mAh LiPo Batteries such as the ones supplied by Pimorini:
https://shop.pimoroni.com/products/lipo-battery-pack?utm_medium=cpc&utm_source=googlepla&variant=20429082247&gclid=EAIaIQobChMIivz0x7rb3AIViArTCh1ljwofEAYYASABEgLvQvD_BwE

The standard case will hold two of these. There is also a version of the lid with the fins missed out which gives ample space for 3 (6000mAh in total). This is sufficient for 1