In the commission stage it sets out the routine for calculating the Extruder offset which i have completed fine. mine worked out at T0 X = 149.3 T1 X = 111.6 T0 Y = 004.9 T1 Y 005.6 X= 149.3 - 111.6 = 37.7 Y = 004.9 - 005.6 = -0.7 Extruder offsets X = 37.7 Y = -0.7 M218 T1 X 37.7 Y -0.7 Now on the Wiki guide it says to input the code in your slicer settings is easiest and then just moves on. I have had a look on Simplify3D and think i have it right but wanted to check before i procede incase i fiddle with the wrong settings. on the simplify screen bottom left corner is "Edit Process settings" In that menu is a "GCode" tab but in there are several sections that could be right, where am i to input the numbers i have? is it in the Global G code offsets or Origin offset I presumed it was tool head offset, but it then asks you to chose which tool or am i looking in the wrong section?