Hi, including a couple of pics of how my extruder is limited on the right side by it hitting the frame. It's about 8mm before it activates the pre-installed x limit switch. Even if the cover is off the actual steel bottom bit collides instead. The nozzle is about 12mm away from the print area edge. Left side is fine since the extruder is offset. The extruder is snugly screwedto the x-wing with no issues. One thing I did observe during construction is the screw that is the axis for the filament tension wheel is long enough to make fitting the extruder onto the wing carriage a little tough. I had to file about 0.5mm off the end so it would go on. You can see this in the third pic.
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I was thinking this extra long screw was not the factor here but I am going to attempt to shorten it further so it does not stick out past the cover plate at all. Another 1.5mm to remove carefully. Fun.