I just got a real good deal on an American Arms Silver II O/U. My questions are on the choke tubes, etc. I got 5 choke tubes with it 2 of them have AA Skeet on them so I know what they are for but the others only have notches on the ends, one has 1 notch one has 3 and the other has 4. I put inside calipers and measured them and the 1 notch is the tightest. I want to know if someone else has the owner manual that tells exactly what one is which. I know the 1 notch is either full or extra full. Also if someone has the owner manual could I get a copy? I will pay for copying and mailing. I did not get a owners manual with it and I cannot find American Arms on line. Any help would be appreciated. <!--emo&--><img src="http://beartoothbullets.com/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=''><!--endemo--> Also how good are these guns? Thanks in advance.