Take a look at their 'home-runs' in-a-drum!
Instead of independent colored spools, they've come out with an entire drum with co-ordinated colors in #10 THWN-2, and such, so that you can pull under slab home runs forever without playing with spools.
It is sure to eliminate a lot of 'tails.'
[ If you shift from 500' spools to 2,500' spools your tails drop by 80%; with this drum approach it's like having a spool 10,000 or more feet long.]
These drums are so heavy that they need a special hand truck -- duly provided by Maxxis.
Check out Electrical Contractor magazine.