By the way, I had an old CAAD8 (I think 2006 or 2007?), and I loved it. I got it REALLY cheap of Ebay, coz it had a small dent in the top tube.
The dent eventually turned into a crack after a couple of years. I had it welded, but it only lasted a couple more months before cracking even worse, right next to the weld. I knew a successful repair was a big long-shot, but I thought it was worth a try, because I liked it so much