R2D2 holoprojector lens ring
thingiverse
This small ring will help hold the glass fitted inside the R2D2 holoprojectors. I used the Crystal Glass Magnifying High Dome Half Sphere Round Cabochon 38mm A5949 from ETST.com which fitted perfectly https://www.etsy.com/uk/listing/524072984/crystal-glass-magnifying-high-dome-half?click_key=7c92d5e4598e448ad7386b2a3d58303cf4281058%3A524072984&click_sum=1470b85e&external=1&ref=hp_opfy-1-1&sts=1
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