I didn't read the entire thread on what and what not, you did, but the first thing you need to do is bleed the master.
I don't know which one you have. Some have bleed valves, some don't.
If your's is a don't then you HAVE to disconnect the lines coming out of it and fabricate a tube that connects to the output and curves back into the reservoir.
These things are very sensitive to not having been bleed.
It only takes a couple of pumps of the pedal to get the air out of it though.
Very low pedal is a sign of this and the power bleeder will not do the master from one of the wheel locations.
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