You'll weaken the tip a little if you fuck with them. If they do delam, warranty them.
But... one of my Big Troubles delammed 6" on my first day hitting big kickers on them. Dynastar wouldn't warranty, even though my shop dealt Dynastar, because they said it was a "known problem" that year. They told me to send them to Quebec and they'd rivit them together and the other one "just in case". That would have cost me a load of cash so I did it myself, and two on the tails too more for looks than anything else. So yeah, it can be done.