Some horses can be hard to fit and I don't believe the "gaited tree" hype. I bought a nice Circle Y flex tree and it sat me up so high off the horse. It didn't work for my horse and called them to get me something else. They didn't have a tucker either for me. I bought a narrow tree and they wanted it more narrow to get it up off his withers which didn't seem right. When the trainers had the horse they commented how hard he was to fit and they all used a wide tree.
I did some research on Steele saddles, bought one used (they are hard to find and they hold their value) and couldn't be happier. I just got the standard tree
They sit you close to the horse and feel secure.
Call them and they will talk to you about what makes there saddles a good choice. They will also send out one to try. Custom Tree and Saddle - Trail Saddles Built By Trail Riders