Remix of https://www.thingiverse.com/thing:2854575 , resized to fit a USB camera such as https://www.amazon.com.au/gp/product/B09QBF85T6/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1 

I was using Bogdanko's original design, but my pi-cam failed. So here's a redesign for the USB cam.