You're quite welcome. I'm glad to help.
Here, there's tubes from Beretta and Remington, for factory stuff. Also, Seminole(extended), Hastings, Colonial, Carlson's, etc, as aftermarket.
They all work and have been tested. The only tube I ever found wanting was a Remchoke. Non concentric and POI differed. Gave it back to the dealer and the replacement was satisfactory.
I've shot birds at field trials but not recently. Used 870s.
Good idea on the pad.
Good luck,you've a fine shotgun.....