I bought a Vitus 979 off Craig's List a couple of weeks ago and have decided that it is too small for me. I was not able to test it out when i picked it up. Frame size is 51cm, i am current riding a 54cm. while cleaning it up to prepare to put up an ad for it I was really liking it more and more and am now wondering if it is OK to replace both the seat post and quill stem in order to try to change the fit. Both ar already at their max extents.