My aero aluminum seatpost is currently stuck in my aluminum seatpost. What can I do to get it out? I can't push it around to get it to loose since it's aero, all I can do is pull it out. Also, I'm about to get a carbon seatpost, so what can I use to make sure that my carbon seatpost isn't going to get stuck in my aluminum frame? I heard that using fibergrip and anti-sieze is bad for aluminum and grease is bad for carbon. What should I use?