This is a redesign/extension of a static 2 shelf display stand by Tom Harper. Used his design as the basis for this expandable display stand. Everything can be printed without support needed. You start of with a bottom and a top shelf and 3 poles for the 2 shelf display and by adding each time a middle shelfs and 3 poles you can expand to as many shelfs as you like. You might want to use the "Bottom shelf extended" if you go beyond 4/5 shelfs for stability. Everything works with tight fit, no glue needed.