I have a Featherlight 16 ga. made back in the early '50s. Right now it has a full choke, and I'm really wanting more options. The gun is in great shape, considering how old it is and how much it has been in the field. I'm debating whether to just get screw-ins put on the original barrel or see if it's possible to buy another barrel with chokes and not cut on the old one. Any opinions/advice or other options I haven't come up with yet?