Due to size constraints of the print head, I was having part cooling problems for my Voron V0. I went through multiple 3rd party extruder designs but none of them provided adequate part cooling. Most if not all of them use those small and thin <5mm thick blower fans that dont provide enough airflow to cool down the prints.
This design that I found from chirpy2605 uses a pretty unique solution, where a large 5015 blower fan is gutted and retrofitted on top of the extruder with fan ducts that route the airflow to both sides.
I had to cut around the shell of the 5015 blower fan which was surprisingly easy.
For the extruder I used the “Roundhouse Extruder” that the creator reccomended. I was impressed by how well it was designed with how easy it was to print and assemble. However, I did slightly edit the 3D model so that the PTFE tubing friction fits into the opening as I didnt want to use a PTFE coupler. I also made the extruder arm larger for more strength.
I really like this design and I plan to remix this extruder setup even further with LED lights, a nozzle camera and perhaps a 4010 heatbreak fan instead of the loud 3010 one.