Originally Posted by
Lascauxcaveman
That's a good thought, and you may be able to get away with just gently rounding those corners with file and sandpaper at that point, rather that redoing the whole shebang.
fender1 does not mention what the frame's seat binder arrangement is.
if, for example, it uses a welded seat lug with integral binder ears then this technique might be the ticket and problem may have nothing to do with seat tube itself.