I'm not a mechanical engineer, but I think my issue may be exacerbated by the fact that in order to get the right position for me on the S5, I use the rearward mounting hole of the aero post, but then have to slide the Adamo forward almost all the way until I barely have any rail left behind the clamp. So when I am perched on the front of the saddle during hard efforts, I have created a lot of lever force with all of that unsupported rail. Sorta like being on the very end of a diving board.
So my question is, has anyone seen a single position post for the P3C, S5, etc.? The balancing point of my Adamo is practically dead-center between the two clamp holes in the seatpost, if there was a compatible seatpost that had just one hole in the middle there, my issue might well be solved?
Does such a thing exist?
Race Director, Velo Club La Grange (http://www.lagrange.org)