I just got a Sitero saddle to try on my Shiv and I can't get it far enough forward due to the shorter rails. I am looking for the more angled setback (37.5mm) post along with the clamp for "Carbon Rail". I believe some Shiv modules came with this seatpost as an extra item. Let me know if you happen to have one laying around and you're willing to let it go for cheap! I'm not sure how the Sitero will work, thus my reluctance to spend top dollar for a new one. Thanks
It looks like this:
It looks like this: