Oh.. yeah... I already started to fill up with stuffs like... Motors, Step-motors, heatsink, Ardiuno Sheild + DIY ( I include a big pink anti-static foam ) , Arduino boards with a anti-static foam, Battery holder, transformers, speakers, LCD display with a pink anti-static foam, big variable capacitors.... 
Rooms for more... XD
Thank for you comment... That one advantage when you drive a mini school bus, you do see "garbage" along the way...
If you subdivided those drawers, you could have one heckuva parts storage cabinet
Oh.. I see.. that is a great idea... 