Bolts not an issue. I think moving it back farther has helped. I had it forward a bit, paranoid about scope eye. Never had it. Less shadowing.
I think one of main issues is consistent set up.
I don't care for credo rectile. But once I get past set up, it probably won't mater so much. The laser works for many. But I am not as whimsical as most about life, my job and life. I want back up for my back up. I work in job that does not forgive failures, and I see failures, so I know everything fails. Office people, can say LED last forever.