I stopped by the lbs today (there are 5 within 8 miles - awesome). They put the measurement stick in the frame and confirmed my post is the right size. I did buy an Allen key binder bolt as I was having trouble torqueing the qr enough to keep the seat from sliding down while riding. the only thing I don't like about the binder bolt is that the bike goes all the way through the receiving bolt on one side and looks kinda ugly on that side :-) maybe I will saw it off so it's flush. Thanks again everyone