I”ve been making this style of lampshade for several years. We won’t go in to how much kindling I made before I was happy with the design & the quality of the assembly. The prototypes were made long before I upgraded my tools to include Sketchup & the Wixey angle gauge. How much easier it would have been with them! I’ve seen other versions of this style of shade but they all seemed too “heavy” for a shade. Despite being made from very thin stock they are amazingly sturdy due mostly to the shape. I do my own glass work & use many different colors & designs as well as Mica sheets.