@neotko, of course you can suggest changes, feedback is one of the reasons for open sourcing it from the start, i want to make this as good as possible :-)
I have uploaded a new version to Thingiverse with 0.15mm larger nut traps and 4.2mm wide holes over the motor screws (i had to shorten them a bit compared to your version to not make the hole too much into the nut trap, but you should be able to angle the screwdriver slightly with no problem)
https://www.youmagine.com/designs/belt-geared-um2-feeder-upgrade
The file is "geared-feeder-plate-V2.stl"
The shafts also look great, and if you a