Filament Spool Rack

Got tired of having my spools in a regular holder, and having to swap them all the time.
The idea is that you can make a rack as long as you want, provided that you have enough 8mm smooth rod.
What you will need:
At least two supports (you need to print each half and then glue them together to have 1 support)
4 bearings for each filament spool that you want to hold.
Enough clips to hold all the bearings in place.
enough 8mm smooth rod, just measure your spools, add some wiggle room and the