Is the 22 gauge wire that came with the kit thick enough to extend the extruder heater wires?
You should be fine if you are using the hotend I sell, but try to keep the length down. The most power is drawn when first heating it up. On the one I sell it was just under 12v 3A so 22g should be fine, and that only lasts a few minutes then its under an amp.
Feel free to correct me if I am wrong anyone.