I just had a look in my box o saddles and I have just about every version of SST but the 98. I have been in the same boat as you but with a version of SST that I can't figure out which one it is. It is flatter than any other SST I've found and the rails are tucked up under the saddle and don't stick out from under the saddle at all. In my quest for a double of my super comfy SST I have bought so many SST's trying to find a mate.