Quote Originally Posted by buffybike View Post

I do tend to scoot up onto the nose of the saddle, I've noticed. I do that to avoid the chafing I get (on the inside of my crotch where my leg "ends") which happens if I sit too far back in the saddle. T-shaped saddles work better for me based on experience (as I've tried the Selle Italia Lady Gel Flow and other more pear-shaped saddles to no avail).
If you scoot forward to avoid the chafing, then you are making your sit bones deal with a narrower portion of the saddle. They are no longer on the 143 section, they are on perhaps a 120mm section, half on and half off and stuck on the frame edge. Essentially, the pear shape is forcing you to ride a narrower saddle.

You may want to look into your Brooks a bit more. Work out the placement on your century bike, and take it on one of your longer rides. It may be perfect, if you've already been riding on it and are familiar with how it feels.

Granted it's a bit late to be trying a "new" saddle, but your Brooks is not new.