Thank you for all the replies. We started in this sport late October with field guns. She was the first to get a true trap gun and I just got mine (a 99 also) Now's she's "dropped the gauntlet" and it's a coin flip who's outshooting who right now. She is shooting Remington STS or Winchester AA, Claybuster Windjammer, International Clays 18.5 Gr., 1 1/8 oz #8, Cheddite primer. It is the same load I shoot and I love the pattern and she refuses to shoot less. She feels it will put her at a competitive disadvantage. Due to her comb configuration, there is 1" of stock between the end of the comb and the adjustable butt pad. It is a gel type butt pad 1" thick. It seems the slick slide is the way to go however, I believe it would be less expensive to sell her gun as is and find one already done. I'm thinking I'm looking at +- $300 to get this done.