Nice. Yes, I’ve had the best results with a Silicon-Nitride BB/Tungsten Surface Lift Kit. Lowest Coefficient/Friction possible between them. However, I’m just using my Titanium Lift kit with the Si3N4 BB against the steel set screw in my Lumley Ti. BAS. And yes, it has made a slight impression in the steel. (That Si3N4 is some hard stuff!), however, I’ve stopped searching for having the ultimate lightest bolt lift. It’s still light, but not as light as once was. I’ve concentrated on efficiency with the firing pin and the most important aspect being to maximize the amount of Striker Travel, aka, Firing Pin Fall. The set screw is a good mod. Or making a tighter spec. Cocking Piece, as other with the ability have done. Limiting the loss of Travel is key.