Just curious LarrySellerz , Does the bike you get this on have a much longer head tube compared to the others? I've had death wobble when going at high speed down hills. The bikes I experienced it on all had very long head tubes. They were also steel bikes from BITD. Haven't had it on the few steel bikes I've had from BITD that had shorter head tubes.

The resonance you talk about does seem to be in the front doesn't it? If you are talking about the resonance you get at higher speeds and higher power into the pedals when in the 12 or 11 sprocket, then I get that too sometimes on most any bike. However that is never perceived by me as dangerous. Just a interesting feeling that lets me know I'm in the "zone".