After only a couple of months with the version 2 extruder, the insert / collet BROKE. I contacted Anycubic and they wanted me to spend $50 for a new extruder. No way - so I made a new adapter for a pc4-m6 ptfe tube. Be careful opening the extruder - that sensor and spring can fly across the room!! open it enough to remove the old and put the new in. No support needed - just screw the connector in… and use ABS,ASA or PETG - PLA will deform from heat. Enjoy and save $50.