I would suggest you switch to ASH-170 if possible. .009A is at the high end of what ASH-110 is capable of, and your using ASR-110. Peening with a small shot at the velocity necessary to achieve the intensity you are looking for is potentially damaging to the part surface and you could be doing more harm then good by peening it in this case.
I would also suggest running a complete new saturation curve with a minimum of four points for each intensity verification location. Just running T1 and T2 after making a process change proves nothing.
