Update - So I was really confused as to how/why when the kit said change Esteps from the standard 93 to 130/146 (Depending where you read) but in reality after changing to 130 and requesting 100mm - the measurements were way off.I had to change Esteps to 354 to actually get 100mm when requested, so as nobody answered my initial question I spent a good few hours trying to get more info, so have checked the coils in the Stepper (4 wire) and have 2+2 nothing more nothing less.I then removed the stepper extension/rewire lead and plugged my original cable and it does exactly the same as with the extension cable.I have retuned to 93 Esteps and this is also giving no where near 100mm when requested.So have I suddenly gained a faulty stepper motor or has the FW gone out of kilter.Does anyone know how to check a stepper motor? if so please help - at time of writing this update over 60 people have viewed this thread but sadly no replies.Thanks in advance.