I tend to try to get right angles from shoulders to elbows to forearms (if that makes sense). I place my arms on the pads where it makes that happen, as it lets my skeleton help my muscles support my weight. I keep what weight i have forward on the pads I think. That is the biggest comfort area for me -- when that is right, much of the fit feels better!

For eyes -- I know I ride looking down a bit, but up enough to see what is coming. That's one reason (that and better control) that I sit up around lots of other bikers/people. I did try an aero helmet this weekend, and found that with it I have to look up a tiny bit more but that it basically sits right on my back where I am, so I take that to mean it's a decent head position.

Another thing to keep in mind is that we all have different flexibilities. I am pretty flexible, and ride with (so I've been told) a bit more drop than a lot of women ride for long course. But it is where I'm comfortable. The best fit I ever had used no tools, no theoretical angles, and had no goal of getting me to a certain position. Instead it was *all* done on how I felt -- minor adjustments of everything on a fit bike, with about 8 different sets of bars, and just seeing what I said was "better" between sets of choices. In the end we took measurements, and it just happened that I was pretty much right in the recommend tri bike ranges! And I'm convined that I'm at the part of the range right for me.

What I'm getting at is that depending on how the fit was done, feel free to play with your setup -- add or remove a spacer, see where you are comfortable. Just keep your measurements written down so that you can go back to the other ones if they were better. A good bike fit to me is now a long process of getting a set of numbers, and then playing with it on the road. Best of luck!

Thanks for the replies. You both bring up very good points.

I must have forgotten that when I first started riding my road bike, I had some mild soreness/discomfort that soon went away after (a) I got more time on the bike and (b) I tweaked the seat height and position.

Give it a week or so between tweaks. There are specific muscles that the tri position hits that nothing else really can. Expect a little soreness. The more you move stuff around, the longer it will take to adjust.

Be very systematic in your adjustments. Ride in your current position for over a week. Maybe 2. Let you body settle in and adapt. If there is one particular thing bothering you, amek the adjustment and give it a couple weeks. Try not to mess with too many variables at once- just like high school science ;)

Seriously, you might try doing Yoga....To improve your flexibility then gradually lower the front end as your flexibility and tolerance for holding that position improves. You might bring it up a bit now, it might be more comfortable for you.
The neck pain eventually goes away with more riding. You have a Cervelo, so Don at ATC could help refit you there.
A core strengthening exercise you can do to help hold this position is called a "Plank". Try to hold it for as long as you can. Good luck