Okay. First off, the obligatory praise; this mod makes space-efficient interiors so much more pleasant. That said, I've noticed a few issues while building with it.. All of which being related to air and pressurisation.

Firstly, and most problematically: diagonal blocks seem to count as full blocks for the purpose of filling a ship with air.. Meaning diagonal passageways, despite being wider than conventional passageways, cannot be pressurised, and block air from reaching areas beyond them as well. While this could result in novel doorless airlocks, it also seems terribly unrealistic and is causing problems with my ship designs.

Secondly, and maybe least problematically: airvents don't work when there's a vent door between them and the shaft. I'm not really sure if this was intentional, but it doesn't really seem to make much sense.. And it wouldn't really matter if there were a shaft door that doubled as a vent.

Thirdly, lastly, and of moderate importance: airvents (tricky little buggers) have really elusive bounding boxes, and trying to remove them in creative tends to be a bit.. messy. As in borking half a room while trying to click on it.