He shoots whichever Glock he's feeling the need to test drive that night. He's won almost the complete set from the Glock matches, so he's got a few to choose from
I'll leave it up to a somebody that competes with Glocks to tell you the full list of things to do, but with a basic trigger job, tungsten guide rod, and maybe some sights, you can be competitive with anybody using that gun. You just need to focus on practicing with that gun, and compete at a bunch of different matches. The harder the other matches you compete at, the easier FNS will seem in the future.
I agree with you. I'd love to meet and shoot with him, he sounds like he has a lot of knowledge and skill!