Digital BW, The Print

All of the step wedges in the 2.3 version of QTR has a gray gamma 2.2
profile embedded, _except_ the step-21-random file, which has QTR - Gray Lab
profile embedded.

It seems to me they should have no profile, or it should be QTR \ufffd Gray Lab
if you want to use them with the generate icc tool.  Is that right?
Furthermore, if you want to convert them to RGB to profile something other
than QTR, such as BO printing through the Epson driver, they should not be
converted to your RGB color space, but converted by \ufffdconvert to profile,
QTR \ufffd RGB Gray Lab\ufffd.  Do I have that right?  This would give pixel values
for the 50 and 95 patch of 128 and 13, rather than 118 and 24 that a gamma
2.2 RGB space would have.

Here is the question:  What values should an _untagged_ 21-step wedge have,
when printed for use with the QTR-generate icc tool?
Should it go up linearly by 255/20?

Side questions
A gray pixel value of K=50% and L*=50 should be 118 when converted to a RGB
gamma 2.2 space, correct?
QTR \ufffd (RGB and Gray) Lab space gamma is 2.45, but only at L*=50, correct?

Best regards,
John Moody