ordered the new STI 9mm 170 with grams guts and Dawson SNL basepad from Brazos (I'm loyal to Bob). I currently run the older STI's with grams and a spacer, same basepads. Call me OCD but in the end I wanted it all to match as no report I read really indicated one better than the other. I'll report back - running this in an STI GrandMaster Trubor 9mm.