Maybe the guy just needs his 15 minutes of fame, attention, or a little recognition. (or perhaps he's just a lonely soul.) Tell him, Good Job on the build, Just like you would any newbie. Offer advice on the fork flex, ect,ect. And hope his next post is a question or advice relevant to the thread. And try to guide him in the use of the forum. If he just wanted to show off his new build, COOL, But then thats how he should present it. And explain THAT to him. To keep it RELEVANT. I dont wanna be rude either.