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Yeah, I'm using the lastest version 1.1.8.
Usally you adjust to the position of the X-Endstop with the line "#define X_MIN_POS" in your configuration.h.
It works in the way that if your nozzle is for example 12.3 mm left of the left edge of the bed after homing, you set the line to "#define X_MIN_POS -12.3", then the left egde of the bed corresponds to the X-Position 0.
For the chimera upgrade I had to use a little trick, because Cura is very stupid at handeling 2 extruders. It always assumes that the head can only move within the scopes of the bed, so the left nozzle would not be able to reach the right edge of the bed and vice versa. There is no way making Cura understand that your head can also move outside of the edges of the bed, so I set the bed in cura to be 2*18mm wider than it actually is, because 18mm is the distance between the two nozzles. To maintain the right center of the bed I had to add an offset of 18mm to all X-Coordinates which can also be achieved through the "#define X_MIN_POS" setting.