Remixed from the original design for my needs.

Added a lip to the 6-bottle back to prevent bottles slipping down when stored nozzle outwards.
Added a smaller lip to the front rack to make it a bit stronger, less flexible. Also includes a clip that can be glued to the sides to facilitate stacking the racks.

Paint_Rack_5_bottle_back.stl - 5 bottle wide rack Paint_Rack_5_bottle_front.stl - 5 bottle wide rack Paint_Rack_back.stl - standard flat back panel Paint_Rack_back_lip.stl - back panel with small lip at bottom Paint_Rack_back_lip_7mm.stl - back panel with large lip at bottom Paint_rack_clip.stl - clip for stacking the racks - need 1 per upright section Paint_Rack_front.stl - standard flat front panel Paint_Rack_front_lip.stl - front panel with small lip for reinforcement Paint_Rack_Side.stl - 5 row side panel paint_stand_2_row.stl - 2 row side panel paint_stand_3_row.stl - 3 row side panel paint_stand_4_row.stl - 4 row side panel

To build, choose the height of side panel required. Print 2 end panels, plus 1 end panel per extra section (in my picture I have 3 sections, so 2 end panels plus 2 for the middle panels) Print as many front and back racks as required for your setup. If stacking, print 1 clip per upright panel.

Use CA glue (superglue) to glue racks into side panels. The ends of the racks will fit in to both sides of the panel, so no need to mirror, and only need one upright panel between sections.