I've only had the one rolling chest since about a year ago, prior to that I had three Kennedy hand boxes for most of the smaller hand tools. It was more portable, but sucked to work from once I had a garage space. The rails worked best for the hand boxes to keep them organized and I just kept them on after the toolbox shift.
Another reason I still have them on rails and haven't designed and printed drawer organizers is, my rolling chest is a Husky. That in and of itself isn't the issue, but it's the standard duty, not the heavy duty or pro line. Overall not a bad box for the loot and the drawers are nicely sized, but the drawer bottoms are somewhat weak, particularly the full width top drawer, which also happens to be my socket/ratchet drawer. It appears to sag with nothing but air in the drawer, much less this menagerie of relatively weighty stuff...
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The partial width drawers don't seem to have the same problem, and are holding some decent weight.
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No issues with this drawer, it's just one of my favorites.
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