Delta raised heated bed mount for 2020 aluminium profile

The mounts are designed to raised the heated bed from the base for 12mm in order to have a little distance between the stepper motors and the electronics underneath the bed.

My original design uses only M3 screws which is not ideal for mounting on the 2020 aluminum rail. The new design uses M4 screws, so that you can easily slot a M4 square nut into 2020 the aluminum rail in order mount the base. The new design also come with an embedded M3 nut so that the thread for the clip will hardly lose