small lite duty modular storage shelving. multi size and multi purpose.  with small hard ware to building blocks in mind this is a convenient simple storage idea.      base is 100mm round, 152mm tall.  mid sections range 20mm to 50mm in depth. (can be mildly scaled in height). tops ass of now are a plain option and a building block studded option.         printing is simple using more walls is better on this build