That's a good point. But all the homemade CAI's that I've seen really look crappy. Actually there was one guy that bought some mandrel bent 3" tubing and made his own and it looked ok, but it was more than $10 for the tubes..
I've only seen a couple Home made CAI's. Cant say they're the prettiest things in the world. Deffinatally lacking the "Bling Bling" of any metal CAI. Heck, even the densecharger is leaps and bounds over home made.