Taurus,

I would try posting your pictures and questions on some of the gun forums like;

http://www.thehighroad.org/

http://www.thefiringline.com/forums/index.php

or

http://rimfirecentral.com/forums/index.php?

I know the last one is a rimfire forum, but there is a Mossberg forum there and those guys know whats what. Good luck....