Awesome! Thanks for taking the time!. Would it be possible to measure the height from the bottom of the dovetail for comparison? I see a small gap under the factory sight. If the gap differed between the two by design, that would change the equation.
Thanks for the advice Dannoman! I've had the same problem with my Sphinx SDP Subcompact Alpha and happen to have a set of 10-8 sights for a Glock 23 available. My gunsmith conducted the transplant and tomorrow I hope to try out the combination. Like you said, the match seems perfect!
ETA: It works!!!
I tried out the new sight combination yesterday at 15 yards and here's the result. My first shots were fired using a 6:00 hold on bottom of the (new) diamond target. Seeing that my rounds (147 grain Federal HST standard pressure loads) were impacting at Point of Aim, I lined up the tops of my front and rear sights on the center of the diamond. I can't express how relieved I am to have FINALLY found a working solution to the low impact issue.