How a wade saddle tree should fit

There's not much information on how to make a wade tree.
I did find this old website showing the steps.
You would need to determine the wade angles and make sure that the curve fits your animal nicely with a nice fan out to avoid digging into it's scapula.

http://web.archive.org/web/20071216130534/https://freckerssaddlery.com/saddle_tree.php