I needed more dividers for my Plano 5600 deep series storage boxes so I modeled this. For simplified printing it's flat on the back but the lip on the edge is very sufficient to hold into the grooves perfectly, the rounded bottom edge match the originals perfectly as well, in short it just works.
Mine are for my shop but if you plan to use this for fishing or will be stored hot (trunk) then I suggest using a higher temp filament than PLA like ASA, PETG or ABS. Please feel free to use or share these but do not sell them.
The author hasn't provided the model origin yet.