I'm hunting for a monoflap xc/jump sadlde and I have no idea what a 1aa flap is. I also don't get how a saddle can be a "normal" tree??? whats up with that!
The 1a I think is the least forward flap. The most forward is a 2aa. I am 5 2 and the 2a flap was way to forward for me and I don't think my legs are particularly short for my height if that helps!