For some reason whenever I slice a model using cura and then try and print it, the first thing it does is raise the bed to the point where the springs are being compressed by the force of the print head pushing into it. When I just use pronterface, g0 z0 the z homes so that the print head is just in contact with the bed, no force applied. This is fine. However for some reason the line G0 F3600 X83.285 Y93.126 Z0.3 in the GCODE makes it ignore the z endstop totally and push into the bed. Any idea why this is happening? It also seems to ignore me if I use pronterface to manually adjust where z0 is using g0 z0.5, then g92 z0, and still pushes into the print bed. Is there any way I can fix this? I've attached my GCODE in case it's a command somewhere else, but I've looked through it and I can't see where it could be... Could it be a firmware issue?