Well, ask and ye shall receive.

You've had suggestions all over the board, and here is yet another. I duck hunt with a BSS that has no barrel selector. I also shoot it in S x S competitions, where allowed. I had mine opened to Mod and Mod. My feelings were that if I could not select which barrel would fire first, why would I want two different chokes? That was years ago, and I have not changed my mind. People worry too much about chokes anyway, IMO.
Stallones is probably nearer right, for your situation. Try two light Mods, spreaders will open them even more if the need arises. You might even be happy with two IC chokes, but the LM are more versatile, I think.
Forget the choke tubes. Ain't worth the money. And, there's always a chance of the shop doing the work screwing it up.
SRH