Maker Beam Spool Holder

I made this so i wouldn't have to reach behind my Ultimaker to change the spools.
it uses a quantity of 4 - 4mm ID 12mm OD and 4mm thick ball bearings.
i used 4 extra tall melt in 4mm threaded brass inserts in the axle pieces.
there are also 8 4mm flat washers.
the aluminium extrusion maker beam, i order it direct from here: https://www.makerbeam.com/

i also printed, but didn't use the body piece, it doesn't seem necessary, but i included the model in case anyone wants to try it out.