Original roller in the MR21GC WILL break eventually.
Here is a push button to fit instead of the roller. It allows you to use the action button of the remote at the expense of no roller selection. You soon get used to using the up/down/left/right buttons instead of the central roller and this push button replacement should last ‘forever’ :-)
I use Bambu Studio. Using the ‘LG-MR21GC_push-button.3mf’ file is simplest.
0.12mm high quality
PLA+
Wall loops 10
Support: Normal / Snug / 20 deg
Brim: Outer / 5mm
Be careful when removing the support
The author marked this model as their own original creation.