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I'm a mechanical old guy that is trying to get a ctc i3 pro printer running and have a couple of issues that I can't solve.

I believe I have a Anet board with the following info. on the chip.
board V1.0

Issues are as follows:

1) I changed the original threaded screws to a 2 start, 2mm pitch, 4mm lead screw and can't figure out where I'm suppose to change the steps to mm this change requires.

2) I can't change the hot end nozzle temp. A change is Cura does not change the temp. on the display. I does heat up to 180 F but I cannot change it.

Any help would be really great