Update October 10, 2025:

Just a minor update; this might be a bit -too-tight ... so try it and let me know

So, I'm uploading the STL, 3mf and gcode file for version 13 of this bracket (yes, it's been through a few revisions)

I printed this on my K10, and while it works for me, the tolerances are very rigid for what I consider using, but may differ for other owners, so use each file at your discretion to achieve what you want from them. The settings I fine tuned at least for my ERYONE Silver Silk PLA 1.75 I purchased several rolls off Temu on a deal, so this does differ from filament to filament due to expansion etc when printing; keep this in mind. The gcode is set for this filament but the 3mf should allow you to play with these settings to tune with your filament and printer for adequate success.

Afterthoughts: While this fits the tolerances for the rails/guides on the sides might be a tad tight for some users, but I was trying to minimize the 'wobble'

The twist-lock function I based off of phil_prints' version was missing the cylindrical 'notch' found on the original. I added this in, and I also dialed down the diameter from v9 of the opening. This given the orientation of the part in the 3mf file allowed for much tighter fit and may involve some working in when installing this for the first time. I found installing the bracket into the rail system, then using the mount plate or adjoining axis bar to gently twist and work into mounting. Be cautious as the 'stop' where it should lock in at 90° is fragile; especially at printing 0.1mm quality. Over turning the axis bar, or build plate will simply demolish this, but you will have to have used excessive force to do so. This is a tedious part to print!

Lastly, I did cut the belt from a 6mm belt using my other model in my thingiverse profile and this part will use a 3mm wide GT2 belt just fine; once buttoned up I'm securing everything on the belts with simply some cyanoacrylate (superglue). I suppose if you wanted and didn't have superglue on hand you could also simply just melt the part with a soldering iron to fuse the belt in permanently but this disallows you changing out the belt in the future, and they do wear out.

That's it for this part, enjoy the print files!

!~~~~~~~~~~ Based off of phil_prints' version of the K10 bracket, I refined it slightly (and while this works it could do with a few tweaks, but for not it's up for grabs).

This will replace the standard bracket and offer much better tolerances. It also has been modelled to work as a print directly from the K10 in PLA!

Thanks to Phil for creating the initial model to work from. Best to print this in 0.16 mm layer height, and I've so far just printed it 100% infill as the part is so small. Printing with his settings at 30mm-40mm speeds worked fine for me as well.