the original gap on Body1 for stepper shaft is 6mm wide, but I can only find stepper motors with 7mm in most of the online shopping website, so I extended it to 7.2mm, then you can have most stepper motors easily slide in.
Thanks @DanielYWoo for your contribution!
I'm rearranging the repository, I'll design your modification in FreeCAD and add it to the Mods folder ASAP :)
the original gap on Body1 for stepper shaft is 6mm wide, but I can only find stepper motors with 7mm in most of the online shopping website, so I extended it to 7.2mm, then you can have most stepper motors easily slide in.