I have the #1 plain and the #2 grid screen for my RB. I have used the grid mostly, since I am doing a lot of buildings. However, I am planning to do some macro work in the near future, and I would like something with a bit more critical focus like a microprism or split image focusing screen. Both are available. So, any thoughts and opinions? I know this is another "what fill-in-the-blank should I get", so I'm asking for "opinions", not a definitive answer.