I have not used that sysyem but have read about it. Most wood tree makers of all stripes, big and small will work with you to get the right tree under your saddle. That said, I think too much has been blabbed about fit with some tree guys acting like they are the first one on earth to tackle the issue. I do not know of a serious tree maker who doesn't care about keeping the horse comfortable and sound as possible! When it comes to fitting a tree to a horse we must consider that a horse has a different "back " on him in January when he is turned out than he does in August after being ridden most of the summer. If you find a real good horse that you hang on to a lot of years that horse will have a different back on him than when he was younger. For that matter on a hard days ride any horse will have a changed back from carrying the weight and fluid lose during the day. So do we fit the saddle to the fat horse or the same horse thinner, do we change saddles every few years as our horses age, do we have a morning saddle and an after noon saddle?? Of course not, that is why I like most saddlers build on trees designed to to fit a general body type, not a particular horse as he was at one moment in his life. As it has been said, if you build a saddle that will only fit one horse, when he dies you should bury the saddle with him. Just my thoughts.... Jeff