My custom Magnesium Zinn was flawless on the TransAm Bike Race doing everything I asked of it. I have very fond memories bombing down mountains at 40+ in the middle of the night and the Zinn plowing straight as an arrow, unflappable. You met my stability spec. 100%!!! I did change the Enve fork for a Woundup (your original recommendation, and it was more comfortable and would mount a big tire). I really can't think of any improvements.