While I agree flattening tubes isn't a good thing to do, if you do it in moderation to gain a little clearance I can't see it hurts that much. If you saw mine in person you'd see it's only flattened down about 1/4". TTI's have a spot on them that's flattened down by the factory at least that much for clearance. In the case of mine it appeared that's all it was going to take to make them fit until I went to install the torsion bars.
