I have to be super careful about not getting any glue on the right side of the leather. Already I see some glue spots on the right side of the leather. But no biggie since those will be covered.
Laying down the leather on the saddle and then tracing with a knife and cutting out with scissors seems to do the trick. If you notice the dang horn of saddle tree popped off when I tried to sew the leather down.
Presto...the saddle tree is almost done. I just need to cover the seat part of it with leather. I will probably use a different leather if it looks better.