Solved three issues in one shot. By sending the slide to Novak they replaced the bogus plastic rear with a metal Low-Mount Carry black-out sight that's .030 taller and drift adjustable with lockdown set screw(LMSW01H); then they replaced the front with original height in FO (I specified green DFSSW-FO.200). I had them swap the sights for $35 to save myself the aggravation. All-in $119.90 including shipping.
The .030 taller rear corrected my 3-4" low shots, I ditched the plastic, and my 'ol eyes can now see the sights much better. YMMV