Joe, there is no reason that tubes couln't be installed in your 97. Actually I prefer putting them in older guns. There is usually more meat in the barrel walls. And as far as the barrel being shortened, that normally translates into even greater wall thickness so it doesn't hurt a thing. Any competent smith with the proper tooling should be able to do this for you. The tooling is expensive and a lot of smiths would sooner farm it out than buy the equipment. If you can't find anyone near you, e-mail me. I'd be happy to do it for you. George