Not sure about problem 2 but the easy fix for problem 1, at least if you know it will run out during the print, is to lie to the printer. Tell it the back up spool is the same brand, type and color. It will happily switch to the second spool. I have a couple of printed spools that are 2, 3 and even 4 colors using this method to use up spools with just a few meters on them. One of those spools lived in the bottom drawer of my stand without drying or a bag since 2018 and it worked fine for the purpose.
1 Like