It's not that PA6CF is what was tested, it is what the bare minimum is now and the documentation explains that in excess. PLA+ is not durable enough for anything can-related outside of rimfire. Period.
Polymakers PA6CF doesn't need an enclosure, plus, even if it didn't work out you can get an enclosure off of Amazon. There is no longer an excuse to not be able to print PA6CF/GF.
Super excited big dog