Canon EF bayonet for Rokinon 135mm

So you have a Rokinon/Samyang 135mm f/2 lens for any mirrorless format and you want to use for astrophoto. Best option is my adapter for M48 here: https://www.thingiverse.com/thing:6151763.

However people may want to convert it to EF mount. I don't like much the idea, but was asked to develop this adapter. The instructions are more or less the same as here:

https://www.cloudynights.com/forums/topic/939531-my-rokinon-135mm-modifications/

But with the EF bayonet instead of an M48 thread. I don't like much this solution because it puts a lot of strain across layers. So if you want to test this. do it carefully, use bungee cords to avoid dropping parts and print with a material with good adhesion across layers.