Here’s what I ended up with. I grinded the washer until I thought it was about right. When I first put the washer in as original, I could tell it was too thick and the hotspot was too big. I kept grinding until I thought it looked about right on the wall. I think it’s pretty good where its at for now.
man 1.4 sec shutter f/3.5 ISO 400
445yds
220yds
300yds