The New Wintec Wide (same as the Bates Wide) most definitely does suit flat backed natives and does not have a curvy tree. Mine fits my haflingers brilliantly. I also have a New Wintec for my TB, no pressure points and both saddles are better than leather ones I had previously even though they were professionally fitted.
The older Bates saddles had a reputation for curvy trees but the more recent ones (certainly five years plus) are much more "normal" for want of a better word.
I've got a momentum and recently bought a Wintec (the synthetic version) Isabell Werth dressage saddle and am now going to be selling my Bates Caprilli Dressage saddle. Really really rate them, lovely saddles for both horse and rider.
