Digital BW, The Print

I'm about to give QTR (version 2.5.0.1 windows) a try and I want to do
an ink calibration. I have a few questions.

What printer resolution should I use for calibration and for printing
my images? (1440x1440 super or 2880)

What speed should I use? (unidirectional or bidirectional)

Also, the instructions say to have the ink calibration set all the way
to the left at 100.  When I slide the tab all the way to the left, it
reads 0.  If I move it all the way to the right it reads 100.  What gives?

Thanks,

Stan