ACE Pro Interchangeable color hub remix

A remix of the very nice multi color hub by Another3Dprinter The original twist lock design was a bit of a pain to print cleanly without supports and i preferred to use thumb screws instead Printed with 4 walls/top/bottom layers and 20% infill Supports not really needed, can use paint on supports in nut slots only I recommend 0.16 layer height to have smooth walls Materials: 2pcs of M3 screws 25mm or 20mm for short thumb screws for 8 port hub 2 pcs M3 nuts Same pneumatic connectors as in original design I highly recommend to first use a piece of ptfe tubing on all ports to check that it goes all the way in and a piece of filament to check that it goes through smoothly. May needs some minor cleanup/polishing. I used a 2mm drill bit to clean the filament holes and a 4mm drill bit to clean the ptfe holes -by hand, not power tool!