design Lamp shade

# Brief
design lamp shade.

## spec
450mm diameter
made for European Standard ring for E27 caps (inner diameter 40 mm = 1 9/16")

## Assembly
no tools, no glue required
assemble the icosahedron structure using raw 1.75 mm filament.

print pieces:

frame x19
frame with attaching ring X1

Insert and slide 1.75mm filament in between pieces to assemble.

## smaller
https://www.thingiverse.com/thing:5337138