Hey everyone! Thanks for the input :)
I should have mentioned, I have already had two farriers check mine's work, had a vet check for lameness, checked saddle fit, had a chiro check for any soreness. He has a 100% from everyone, he is in great shape, so it is not a physical issue. He also is in very good shape. He gets out about 4-5 times a week, typically an hour at the gait/canter/transitions in the arena and then 1-3 hour trail ride depending on the timing.
Cavaletti training helps ANY horse. I used to have four of them and I used them with my lesson horses. My QH, "Ro Go Bar" (1982-2009, RIP), built downhill, used to drag his feet and he improved with cavaletti.
Sawyer is also built down hill, so I've had to do a lot of work and training in the past to help him be less heavy on his front end. He's improved a lot with that, which is why I would like to start naturally improving his gait even more.
Also, my barn has the cavaletti stand things, where they pop off when they are hit.
Today, I put ground poles out to do a bit of work on them. I wrapped all four of his legs, and I'm glad I did, because his first two times over he just attempted to power through it and fell onto his front knees. After two falls, he got the point and started picking up his legs nicely in the walk and running walk. I will continue to work on this for a while and then think about moving him to the cavalettis.