I wanted linear shafts on my D-bot after i had some z banding.
found some solutions here but i wanted to use aluminum brackets for securing the rods to the printer for improved stability. (SK12 )
and i also made the brackets for the LMK12UU bearings.
i havent printed these since i am offshore still. so its at your own risk ;)
high infill and 4-6 perimiters.
i prefer PETG