I have a new 2007 Azure and the 27.2 seat post kept slipping. I brought it to the dealer and the tech says the seat tube hole is 2 to 6 tenths of a mm too wide. ( not just at the seat collar but all the way down the tube). My 27.2 seat post and another off a new showroom bike is loose all the way down the tube. I asked about another frame but in another 19in Azure both seat posts were loose all the way down the tubes. Does my seat post need male enhancement or just a tighter tube?