Nice. I also like the rubber grips for light range use. I shoulder carry smaller models and have thought about putting a rubber grip on the inside and a Lok Grip on the outside. I ended up buying a new pistol all together lol!
One thing I did to my old 75B trigger is break the edge of the trigger face on the right side (right handed), cheap easy and true trigger snobs will rejoice! That will be the first thing when the 97 gets here, can't wait.
I had a friend try 75B 3D prints and some of them turned out good and some not so great. I think the ones that were not working would have worked great if they had ben printed solid with no hole and let me just drill the hole correct place.
Have you seen my 3dprinted gripwell (grip/magwell combo) - super sweet, but only in the 9 frames - doh!