50mm inserts for adafruit NeoPixel Ring and Trinket mount for Steampunk/Mad-scientist LED goggles Link for project. (Also place to order NeoPixel Rings, the trinket etc) http://learn.adafruit.com/kaleidoscope-eyes-neopixel-led-goggles-trinket-gemma/overview. These will fit any goggles that use 50mm filters (rather standard) You can snap a NeoPixel Rings into the ring and in turn the ring into the goggles. It will keep the ring snugly attached with out glue and also act as a diffuser. Update: I just added a new version that encludes a inner ring. I used a sharpie to color it black and it blocks enough light from the LEDs to be able to see though the goggles with little distraction. Printed ABS 0.2 mm layer thickness, and a 0.4 mm nozzle with high fill no raft or support. Inner ring keeps the NeoPixel Ring from touching the diffuser to aid in diffusing and to keep the temp down. With the prints I made the NeoPixel Ring fits perfectly and snaps in snugly (no gluing needed) The back is open for wiring.