driftless, I respectfully disagree with the way you worded that. If you said physical problems should be addressed with a properly fitting bike then I would agree, but saying, "Physical problems should always be addressed first with a bike fit," means you need to pay someone to measure you and apply their system to you, which I don't agree with. If one has extra money and a desire to consult with an expert then by all means, but the information a person needs to properly fit their bike themselves is readily available. You don't need lasers, video, and a custom fit system to do it. Ten years ago when my back started hurting with longer rides it didn't take to many google searches to figure out I was way over reaching to the bars.
Today was interesting, first longer ride on the B-17. I switched it from my touring bike one of my road bikes and decided to use an old spare seatpost instead of removing the saddle on the bike. 30 seconds into the ride the saddle had slid all the way back on the rails. I went back and tightened it up and tried again, seemed to be fine. Saddle was so comfortable by by ten miles in my lower back felt find of stressed, checked and saw the saddle had slid all the way back again. I guess the B-17 rails just don't work in that seatpost.
Rode home with the saddle all the way back on the rails. Wasn't terribly uncomfortable, but was glad to get it right. 30 more miles with the saddle locked down in the right position. WOW, I had forgotten just how good these are, it's been about ten years since I last rode one. Like I said my last B-17 had gotten so saturated with oil and water that it had lost it spine and was totally hammock like. This saddle was amazing. Even with a very uncomfrotable saddle sore I did nearly 50 miles without pain, only really feeling it the last few miles. Friday I did 35 miles on my 143 wide Specialized Romin and had extreme pain afterwards. Yeah someone advised me not to ride with sores, but I didn't listen.
Unfortunately there is some cracking around a few of the rivets, the saddle has been on a shelf and not cared for for about 15 years. I applied proofhide before riding, but I think the area round the rivets is too dry. I hope it holds up, but I think I'll buy a new one either way.