I just recieved my new sight today for my bow that should be coming today or monday. It is a Truglo Tru-Site Xtreme 5-Pin Sight with TFO . This is what it says in the description; Comes with four standard and one .040" Tritium Fiber Optic pin. My problem is that the Tritium Fiber optic pin comes off the sight. Do I just use an allen wrench to take the screw off and place it in? Also, where would you put the pin? In other words, should it go in the middle of the other four so I can use it as my 'reference pin' as Tom Miranda puts it, or somewhere else? Thanks for any help guys!