To design Dual color printing, use the parts that originally fixed the upper cover of the clerk's casing to modify it, and add a fixing position for the extruder at the top. The screws need to be M3x25

In addition, because the holes are very deep, it will be a bit difficult to remove them when printing and adding supports.

Can be made of PETG or stronger materials

Enjoy printing!

https://www.thingiverse.com/thing:6753293
https://www.thingiverse.com/thing:6753326