I just dont like the stock spool holder. even though its metal it is still weak..
i find it sagging as soon as i put on a roll of filament.
here is an alternative to the stock holder. (much stiffer)
also has a hole for a lockdown screw so once you slide it on the frame you can lock it in place with a M3-.5x 16mm or longer. socket cap screw.. (might want to put a piece of tape where the screw contacts . it can leave a circular scratch from the screw in the paint.)

in cura.
0.2mm layer height
2mm shell thickness
1mm top and bottom thickness
15% overlap infill
grid infill