Back in the day (when they had in-house suspension), Specialized played with bonding alloy tubes in alloy crowns. It actually worked really well, passed all testing no problem. They were even ride tested after 100k+ cycles of abuse in the test lab and remained creak free and strong. Upper management decided to drop all in house suspension efforts, otherwise they would have gone into production. One of the other things it allowed, which is still a major issues with current offering from RS and Fox that are pressed in, is that it allowed for perfect alignment of the stanchion tubes...