Bought an older, carbon railed, saddle (I believe a specialized Toupe. Branded with "FACT"). But rotary carbon rail seat post adapter I bought from Specialized doesn't fit it. Seat post is a
Seatpost Saddle 7x10 Clamp EAR + Ti Bolt Kit for CARBON RAIL, Compatib | Xotic Tech
eoGEAR Wide Rail Adapter (for Brooks, Rivet or similar leather saddles – Kinesis & eoGEAR
Carbon Seatpost Clamp Oval 7*9 mm Carbon Saddle Rail Parts Seatpost Clamp Suitable For Carbon Road Bike Use
Amazon.com: CyclingDeal Bike Bottle Cage Saddle Mount Adapter for 2 Bottle Cages - MTB Road Bicycle Saddle Rail Mount Water Bottle Holder with Adjustable Angle - Aluminium Alloy Adapter for Road Use