Marble run - 3D Printer parts tuning (gravitrax)

Hey there! This time I show you some new 3D Printer parts! Thanks to Karlheinz for sending me the parts. You can check out his parts here https://www.ebay-kleinanzeigen.de/s-b... Thanks for watching, enjoy! A subscription would be great! :) #kullerkugeln #gravitrax #marblerun