Just got my .40 this week, bought used off of Forum here. Sent email to load info answered that day. Went and shot yesterday this is an amazing pistol, definitely spoils you.
I tried all kinds of lens set up different ways last year. I finally got Rudy Rydons with inserts with my progressive prescription and quit experimenting and learned to use the. I just switch to them about 45 min before starting to get my eyes adjusted