Hi, I'm new to the Rep Rap community and am building a Makibox 3D kit that was offered about a year ago. I was doing OK despite the woeful "instructions", but I am stuck on a connection to the PCB. From the Extruder head I have a green and a black wire from RT with 2 pin plug attached. On the PCB I have 3 sockets :- 1) FAN / J14, 2) HE TH / J12, 3) HB TH / J13. Anyone out there successfully built the kit and could give me a clue ?