USSR - the Ultimate Simple Spool Roller

I like the TUSH (https://www.thingiverse.com/thing:2047554) but it's a bit fiddly and requires care placing spools on it. I'm lazy, so I developed this tabletop spool holder. Just drop your spools on it and go. This design has quite a large distance between the rollers so that spools sit 'within' them, rather than 'on' them. This should minimise empty spools from being pulled off the spool holder.This needs 4 x 608 bearings and..........that's it.Print a base and two rollers. Slide the bearings into the rollers and place the rollers into the base. Don't print the base out of a brittle plastic. It needs to flex a little bit to get the rollers in. Most plastics should be fine.Took around 4 hours to print on my i3 plus with a 0.6mm nozzle.Update: Added a universal one. It stands a bit taller, but will work for standard sized (200mm diameter) 1kg spools, and the 2-3kg spools. This will be ideal for people who mix and match spools, or have really light spools that tend to fall off as they e