The aforementioned v2 that was printing while I wrote the first log entry finished printing (to be fair, it only takes about 1h20m).

I'm slowly enclosing more and more of the project, the fit was much better this time and the Qt Py underneath just neatly slots in rather than rattling around, generally most things "snap-fit" though I need to make the sensor area a little smaller:

I still need to adjust the mounting holes as I've (once again) miscalculated. I'd like to reduce the exposed sensor area and also hide away more of the cabling in v3. After that, it's time to look into connecting a battery. 

Finally, here's a short video showing it from all sides: