Telescope push-fit diffuser cap for generating flats with a t-shirt

A pair of press fit rings to make a diffuser from a white t-shirt to use as a flat field generator. This is an alternative to my twist lock diffuser ring. This is sized to fit the Celestron Origin, but you can create one to fit different scopes by using the openscad file. Place the inner ring on a flat surface with the bevelled edge downwards (the bevelled edge helps with locating when you fit to the dew shield) lay the t-shirt over the ring Press fit the outer ring over the t-shirt and lower ring. Make sure the shoulder of the ring is uppermost I also have a cusomisable twist-lock version for tracing paper at https://www.thingiverse.com/thing:7295723 and a filter tray holder for the Celestron Origin at https://www.thingiverse.com/thing:7295631