5 Drawer Organizer with 3 different drawer options

I needed a better place to keep my RC bits and bobs that just strewn about my desk drawers, so I modeled this up right quick to fit my needs. There are 3 different drawer options, a 15 compartment drawer, a 4 compartment drawer and a 1 compartment drawer. The organizer dimensions are 150x150x150mm (just shy of 6"x6"x6") with 3mm walls all around. The drawers are 142mm square on the outside with 3mm walls also. The 15 compartment drawer's dimensions are 25mmx45mm (roughly 1"x1.75") per compartmen