#1 and most important for a NIB pin: It is not like buying a video game! It is a fully physical thing, and lots of stuff can move around in shipping. LOTS. Sometimes stuff breaks even. (not a lot, but don't be shocked if it ever happens).
#2 Sometimes they don't install stuff correctly at the factory! That's why pinside rules. You can post "does anybody else's so-and-so-part look like this?"
#3 Find the TMNT owner's club thread and bookmark it. Post some fun pics when you get the game, then post questions if things look wrong!
#4 Dont' get discouraged. See items #1 and #2 and remember they are normal. See item #3 and feel better when there are other experienced owners out there helping you out
#5 See #4
#6 when you get a second pin, re-read these items!