thanks neilvosko and UltraRacer13. I'm going to have an alignment soon. With my M3 wishbones and pulled pins I'm hoping I can get to -1.5. I'm thinking this might be sufficient for 255 all around on 8.5s, or dial back to 245 all around on PSS (they don't make 255 for 17s).
Camber-wise,I could go further with some GC Street or Dinan camber plates, not sure if it's worth the cost / install / tire wear for a DD.