I guess I started the B versus C stuff... sorry
I do mostly FED. FED says position C. Personally I tend to line up in the C position and then move toward the pitcher's mound several steps. From position C as specified in the FED book, it is almost impossible to get a good look at a first base play - closer to the mound gives me a better look. Rarely do I make a call at 3rd, so 1st is important and we should stay in a position to see 1st.
Asking for help...
How can the BU see an out and then ask the PU 90 feet away for help and the PU says SAFE!? If the PU sees a safe, then the BU probably was guessing. I never ask my partner to make the final call. I ask specific questions like "Was a tag made? Was his foot on the base?" ... etc. then I give my call based upon that response. ALWAYS ASK THE QUESTION FIRST (gather your information) THEN GIVE YOUR CALL.
Don't shoot first then ask questions.
