Customizable 1x3 storage tray.  Allows for ⅓ sized bins or ½ sized bins or single bin.  The dividers lock in pretty tightly.  If you want a looser fit touch the locking face with a few file strokes and it will be more easily removeable.  I wanted tightly locked in dividers.  

The base model is 14mm deep and 15mm tall off the grid.  The Fusion360 file can be used to generate deeper bins.  Edit the parameter for “BinHeight” to get taller and deeper bins.  The dividers will resize with the model automatically. 

BinHeight - The height of the tray off the grid
DividerSetback - The side clearance of the dividers
StackingClearance - The distance the divider guides are cut back from the top for stacking.  Don't go below 2.6mm.