Getting back to the original note...I'm inclined to question the idea of a B-17 on a suspension post. I get the impression, that this is a hybrid or "comfort" bike, as I've never seen a suspension post on a drop-bar bike. If so, since it is a more upright riding position, you may want to take a look at the B-67. That is a wider, sprung saddle, for an upright position.
Personally, I've never gotten on well with a suspension post. Perhaps I've never gotten one adjusted properly. My experience has been that with my weight on it, it collapses and is too low. Maybe yours is a good enough post that you can tighten the tension enough to just give a little on bumps, but doesn't collapse during normal riding?