MPCNC Roller for Double Belt version with hex trap

This is remixed part for project MPCNC Double Belt by BraunsCNC : https://www.thingiverse.com/thing:3101774

( Great project and build IMHO - Cheers to Leon ! )

During assembly i had problem with roller not taping to outer bearing mount hole, so i changed the part to fit M8x20+ hex headed or m8 metric nut.

I used exatcly this: http://electropark.pl/sruby-m8/10725-sruba-szesciokatna-m8x25.html

Purple part has nut oriented to print with supports. Blue part has the nut oriented to print without supports. This is the only difference.