This is a remix of a lego sorter that I recognized I needed multiples, and different configurations of dividers for my lego sorting needs.  I added holes for application of heat inserts and bolts so these trays can be put together in multiple ways, and hacked the dividers up a bit to provide 1 large tray and one tray with just a single divider, to give some options, while recognizing that I also needed to reinforce the areas where heat insterts will be applied.  Far from perfect, but effective.