so...i did a 53 mile ride today and REALLY paid attention to my setback/stem length/leg relationship to KOPS and my thoughts are this:
the zero setback post seems to be perfect for my riding. it puts me in a neutral position when i'm sitting and spinning. when i'm starting to grind, i found that i push myself back in the saddle some...kind of against the tail of the cambium saddle i use. when i get into the "time trial" position, i'm on the nose of the saddle, my hips are rocked backward, my elbows are bent and i'm in the drops or with my hands resting on the outward most part of the hoods. i feel like if i had any more setback, i wouldn't be able to achieve these 3 positions as comfortably and naturally as i'm able to now.
until this thread popped up, i never really gave my fit any thought. after the BG fit, the noticeable difference in performance and efficiency is all i needed to become a believer. i definitely don't wanna start over thinking it, but i must admit this thread has given me some food for thought.