Digital BW, The Print

I was able to get the linearization to work by spreading my 21 tone Lab readings over the entire array, spacing as well as possible given 21 is not a factor of 100.  Then I filled in the remaining boxes with values spaced evenly between those on either side of any given group. I'm assuming it worked as I didn't get an error message when I hit the "Show Curve" button, it did show the same series of curves as I got prior to filling in the array, however, but, finally, I got a really lousy value scale printed out of the 21 step wedge.  I think Tom Moore is correct that very accurate values are necessary to get a meaningful linearization.  

For now I'll stick with the non-linearized curve as I don't have a densitometer.

Can anyone recommend some newer documentation for the current version of QTR than the Tom Moore piece?  Something with a little more specificity in setting up ink limits on the setup tab and in finding the best highlight/shadow/overlap/gamma settings on the gray curve tab especially.  Since I'm not working with a variable color inkset, or one with a very limited range, I don't see me doing much with T1 and T2 for a while. I'm looking to avoid muddiness in the shadows which I think is the result of one or another of the print heads muting the detail laid down by another. 

Thanks