Good comparison of 255 45+P, 45 Super and 460 Rowland. Noticing reliability issues with the Rowland on several videos and that's concerning. My M&P45 5.6" gun chronoed about 50 FPS higher than his 1911 with the 255 +P load. I'm guessing it would run north of 1100 with the 45 Super load. That's impressive, especially considering the conversion would basically be a Wolff 24# recoil sping and steel guide rod. Sounds pretty cost effective and the ported custom shop gun is really good at reducing muzzle flip. She also sports a Timney trigger so a plan may be getting finalized...
