I just installed a new Brooks on an old frame I rebuilt. I'm having the same issue with it that I had with the old gel seat before I rebuilt it.

Basically, when I'm sitting close to straight up, I feel like I'm possibly too far back on the saddle. The sit bones are definitely still hitting saddle, but they might be pretty close to the rivets, and some of my butt is definitely off the back.

I should say up-front that i have a pretty big butt. I suppose I'll thank myself for that when I have to climb or sprint...

I thought that putting "reachier" bars would help, and they do, a bit, but I still feel like maybe I'm too far back on the saddle. I'm considering trying a setback seatpost, since the saddle is back as far as it can go, but I thought I'd ask two questions before dropping the money:

1) Should I wait until the Brooks breaks in to see if the extra give helps? Or is that actually a bad idea because it might break-in "wrong?"
2) Is there a "normal" spot where the sitbones should be hitting? My tailbone is just about at the very back of the saddle if I'm not rotated forward.

I should note that my knees seem to be in the right spot. So I don't want to pull my body farther back. I just think I might want a different part of the saddle under myself when I'm in the same position.

Thank you!