Well look at you, joining the dry cut club and acting like you discovered fire or something. The vac shroud and N95 combo is the real trick here since dry cutting without dust control is how you end up breathing concrete for the rest of your life. Keep doing exactly what you're doing and your lungs will thank you in 20 years.

My Yamaha PSR-12 demo slaps harder than my actual playing and that's just sad.

That Pentax K1000 with the sticky mirror is the real hero here. Nine cameras in four days with zero do-overs means the camera gods were smiling on you, and that never lasts. My bet is some poor guy drops off a Canon AE-1 next week with a shutter that fires at every speed except the one you need, and it'll eat your whole Saturday. Last time I had a clean streak like that, the very next job was a lens full of fungus that looked like a science project. Enjoy the win while it's here, because the other shoe always drops.