Modular Spool Stand 2.0

Complete ground up re-design of an earlier project of mine.  California Filament spools seem to be quite a bit narrower than most other spools and I have a couple of those and it was annoying me that they never sat right in the original spool stand.  It's still centered around using the Ezy Storage18L/19Qt Waterproof Clear Latch Tote IP-67 from Home Depot because that's what I prefer to store my filament in.  Some things that have been improved:They now use dovetails to co