Respnding to phughes
No, we don't know where. You will have to tell us. Is it your sit bone area that hurts?
<<sit bones in the front of both left and right side. NOT perineum pain. I should have been more detailed in my original post.>>
You stock seat post will work for a B17 or the B67, the B66 is for the old pillar type seat post. The only thing you may have issues with is adjusting the tilt. With a brooks, it works best to have a two bolt adjustment system for the tilt, and I do not know what yours has. A one bolt adjuster will work, but it won't have the infinite adjustability that a two bolt adjuster has.
<< Thank you for suggesting adjusting the tilt. I have completely relied on my LBS but I suspect they weren't that thorough. I may need to go back and get them to spend more time with me since I have no idea what is the proper tilt>>
Last edited by cheezenip; 02-11-21 at 12:05 AM.