Electronics Apothecary
I made a pair of resistor boxes that came out decently well. But they were made from pretty cheap plywood.
A 6x5 apothecary could be a great way to organize the parts. Drawers can all be constructed with half blind lock joints. Evenly space slots for separators ever 1.5". These as label and handle.
Assembling everything with sliding dovetails could also work.