One of my carbon seatposts fractured when I ran over a bump on the road.  Anyone else have problems with your carbon seatposts?  I was thinking about going aluminum.  Also what about seatpost length?  My 29er MTB has a 350mm post on it now but its almost maxed out (at the .5cm mark) and I'm afraid it's going to damage my frame on a big hit.

I've got a few questions about frame dimension:

Have yall found the listed frame dimensions to be accurate?  Do some deviate from their listed specs or are most true?

Are the listed head tube angles from the various manufacturers based on a 100mm fork?

I've noticed that most of the China frames have short effective top tubes compared to their seat tube lengths...this brings me to the final questions:  Is the standover height also higher with these bikes (when matched with a longer seat tube)?  Does anyone know the standover height of the Orion 29er 15" & 17" (with 100mm fork)?