Hi, I have a MakerGear M2 purchased in 9/14, for which I recently upgraded to the V4 extruder and F/G cooling using the "V4 EXTRUDER UPGRADE + REV F/G COOLING KIT" from the MakerGear online shop, Previously I had a V3B extruder. The ABS bracket kept breaking so I took the leap to upgrade. After the ...