Originally Posted by
ridethecliche
I guess I was just under the impression that the saddle would need to move backwards if the crank was essentially moving back at the 3 o'clock position.
Due to the angle of the seattube, the saddle is already moving back when you raise it.
That said, RTC, given all of your current knee problems and history of back and knee issues, I greatly encourage you to stop fiddling with things and go get a professional fit - on a fit bike - not your bike - to determine what size frame, stem, bar, crank you need. Then go buy exactly what you need given your unique physiological issues.
Yes, this may be more expensive in the short run, but it will ultimately save you in terms of pain, medical expenses and continually buying parts and frames to try out what feels better.
Missy Erickson in Allentown is an excellent fitter.
https://www.ero-sports.com/2020/index.php