While building a prusa i3 mk2 variant for a friend I found myself needing to mount a direct drive extruder to the stock i3 x carriage. I started with Ghosty's part as I like how it moves the fan to better cool the heat break. I wanted to give the option to easily upgrade to a more standard i3 extruder later.
With this style of mount it clamps to the extruder stepper so that you don't have to change out as many screws or make other mods to the extruder. I still need to make a spacer as to allow for clearance of the z lead screws. I will also be adding a top the has mounting for a servo and the arm for the switch style probe.