I think the new firmware(188.8.131.52) needs to be changed. The e-steps for the extruders now have two decimal places(830.XX). I have a dual extruder that needs e-steps of about 100. While I can change E0 with g codes, I do not know of a way to change E1 with g codes. I can’t stomach the thought of rotating the knob at the LCD enough times to get from 830.XX to 100.XX. It was bad enough with just one decimal place on older firmware.
It seems like a fools errand to try to calibrate to two decimal places.