Super 10's are great guns. Stan, yours looks like a nice one! Thanks for using the term "Ittaker" which I heard so often from old timers when I was a kid out for small game and while hunting with my Ithaca/Western Arms double with a good fox hunter in town who took me under his wing. The term sure brings back some memories.
I've shot many Super 10's for pattern testing and while hunting with 1-5/8 ounce/2-7/8" shells that simulated the heaviest period loadings, and with nary a problem to include the barrel ribs and forend lug.