There’s a problem though with all of these dry box/dryer solutions - none of them get hot enough to dry some of the engineering filaments like PPS, which requires a minimum of 100 C.
I’m tempted to bite the bullet and get a couple of the Thorsden inline dryers https://thordsen3d.com/ and be done with it.
They’re good up to a 140C and dry the filament in real time, so you don’t need dry boxes to store spools.
[edit] I should add that I’d like to see more third party reviews of it before committing