I'm reading through the steps in the "Prepping the Wiring" before doing anything, just to see that each step works, that I understand where all the wires connect and there any no anomalies. http://wiki.e3d-online.com/wiki/Big..._By_Step_Assembly_Process#Prepping_The_Wiring The first problem I arrived at is the stage where you... "Plug the thinner Black & Yellow wires with the connector on the end into the Connector Labelled Y-. However we have two sets of black and yellow wires BOTH with IDENTICAL connects on the end. The black and yellow wires with (black) connectors go to the limit (micro) switches on the X and Y axis. During assembly I don't remember being told e.g. "use the thinner black and yellow wired limit switches on HHH and the thicker on KKK" Checking with a meter, one pair goes to the X-Axis motor mount with the Y-Axis limit switch on it and the other goes to the X-Axis Carriage holding the extruders so it's possible to figure it out but where did the "thinner wires" bit come from?