This extruder setup is made for the HICTOP Prusia i3. From stock, I had 190mm of safe x axis travel. Because of the fan size, I have had to reduce the usable travel to 180mm. Check the drawing to see if it will fit your printer and take note I have upload my marlin firmware with bed leveling and eepromm enabled. This was designed to allow me to easily switch between direct drive extruding and Bowden drive extruding so you will see it is fit with a Bowden style E3D V6 version hot end. The filament drive is very exposed which has made it sooooo much more convenient to change filaments opposed to the stock version that came with the printer. The assembly reuses all parts from the printer other than some M3 bolts and M3 nuts. The heat break fan/hot end clamp was designed around a cloned E3D V6 so if you have any issues with fitment let me know. Enjoy!

PS. I am using 40mm x 40mm x 20mm Noctua fans. They are really quiet and come with little silicone plugs that fit and secure fans to fan ducts without any screws. I am using the 12v FLX version. Have not had any issues yet (more than a month) withe the heat break fan being connected directly to 24v.