Tried that box at every setting, while it prints prefectly, or appears to , all hinges are fused solid, it just will not bend, when I try it just snaps and you waste the whole thing and scoring with a knife I found just leads to splits after a few opens and closes.

re: blue tape easy peasy, I think that's the reason I switched to Blue tape, if you get the 3" tape you can cover a good section of the plate with one strip and it takes a second to put on, as opposed to the krapton which I think we've both lost hair over.

As for spool holders not fitting, I guess you just figured out one of the first upgrades for your printer you need to print! there is a good one on thingiverse for that that hangs off the side of the machine, fits FF and makerbots, just do a search for spool holders and spend the next hour picking your favourite one.