3D Print of Wall Workshop Kickstarter Edition - the low profile hobby painters' organiser

Hey mate - Have you thought about draws that can side mount? Ive created a "box" of walls that have mountable options on three sides. Would be really cool if I could put something on the edge (My photo explains it better).
Also, a kind of 'cap' on top of the walls that could slot into the existing lock mounts and then slide a across to hide the top of the walls.