Have fun with it man, I love mine. You'll love it even more after you convert it. Check out saiga-12.com...some really knowledgeable guys over there when it comes to the S12's.
Are you sure thats a 25 round drum? It looks like a Mike D's and I thought those were 20's only. If you want a tri rail forend, I have a DPH for sale if you're interested.
"A strong body makes the mind strong. As to the species of exercises, I advise the gun. While this gives moderate exercise to the body, it gives boldness, enterprise and independence to the mind. Games played with the ball, and others of that nature, are too violent for the body and stamp no character on the mind. Let your gun therefore be your constant companion of your walks." Thomas Jefferson