RE: couple questions, please help
1) Better for both to be open as long as your dominant eye matches your "handedness". I am left eye dominant but RH, so cannot shoot that way. It increases your field of view, makes it easuer to see through a peep in low light and makes for mor relaxed shooting.
2) I believe focusing on the target is best. Your pin will ALWAYS float. You'll never get it still, and if you start trying to compensate...oh boy..watch out.
3) Not really..at least that I know of... too many variables involved