We got (2) Circle Y Trail Gaiters - Wide Trees for our KMSH and RMSH's. The KMSH currently rides in a Big Horn 807 saddle (Medium Plus tree) and it is too tight, the RMSH currently rides in a Circle Y Park and Trail extra wide and it moves and rolls.
RMSH: The Trail Gaiter is too narrow, can't slide finders under the skirt easily enough.
KMSH: The 17" Trail Gaiter is too wide (or gullet is too low for his withers). Has good clearance at the shoulders but, the gullet will touch the pad when I am mounted. An interesting side note, the 16" Trail Gaiter we got for the RMSH fits better (can slide finders between the gullet and the pad when I am mounted.) I assume this is normal manufacturing variation but, our Trainer would have been ok with using the 17" if it fit like the 16" did and I used a cut-out pad.
So, the search continues. I need a wide tree with a higher gullet. I really dislike the saddle fitting drama.......(but, guess I like telling everyone else about mine..lol). I figure with the combined experience here we could figure out anyone's saddle fit issues.