AutoCAD Print / Plot :: Margins On HP LaserJet With HP Universal Driver

Ever since updating our print server to use the HP Universal driver, my ability to tweak the non-printable margins has gone away.  In the past I was always able to easily tweak margins within my PC3 files using the "Modify Standard Paper Sizes (Printable Area)" tool.  Setting all four values to say "0.25" would result in an even 1/4" margin around all four edges of the paper.

Now however, that behavior is just plain different.  Using 0.25 all the way around results in plots that are partially shifted off the page.  Using different values for top, bottom, left and right results in one or two margins coming out much wider than I want.  The frustrating part is there seems to be no rhyme or reason between these values and the plot output.  The default values are 0.17 for Top/Bottom and 0.25 for Left/Right but even this results in uneven margins.  Only if I make the slightest of tweaks can I get any tiny bit of improvement, which is still not up to previous standards.  Anything larger and the output is much worse.  I've tried all 0.0, setting top/bot only. left/right only, but none of my combinations of values works.

On top of that there seems to be inconsistency between each printer, even when the printer Model is the same.  For example the output on my 9050DN printers range from just "Decent but not like before" to plain "awful".  My older 8150 DN models look the best but still do not match previous output.  

Is there an alternative way to adjust paper margins?  Is there a new method to adjusting the "Modify Standard Paper Sizes (Printable Area)" ?