You can use this board as mount for you Mini Gerbil inside of your K40. Board fits original M2 Nano mounting holes.
Print with non-flammable fillament or with
...Plus PETG at least.
You can buy your Mini Gerbil here: https://awesome.tech/
Please be aware, that I have not tested plate inside my K40 yet, so I am not sure about USB connector position. I will test it as soon as possible.