VO2Max Measurement Device

This is my modified version of the housing for the DIY-VO2max-Device over on instructables.com/Accurate-VO2-Max-for-Zwift-and-Strava/
All credit goes to the users there: "rabbitcreek" for the initial design, code & the instructions, but also "urissel" and "ivorhewitt" for their contributions! I merely dabbled with my CAD to neaten-up the hardware a bit (which I only achieved partly, I think)

In short: This device measures the oxygen your body utilizes while exercising, which is a helpful metric to control training or determine your performance capabilities. In my opinion, this is the greatest thing since sliced bread and the only project worth wasting filament on - but apparently (for some reason), not everyone is a part-time, unprofessional endurance athlete and mad about suffering on a bike...

Known problems with this version:
1) Weight & weight distribution - my design is pretty top-heavy, so you'll have to tighten the straps to an uncomfortable level
2) Water tightness -