Side ring for the drybox design from Sp4wN

I printed out the parts for the Dual spool Drybox (https://www.thingiverse.com/thing:3320749) but I had some problems at the sides of the rollers. My spools are stucked between the roller frame and rollers.
If you already printed out the rollers you can use this desing to fix it (just print 8 of them and snap onto the rollers), if not I would change the roller geometry so that it is printed in one part with these sides.