In quick, get-it-down form, here are Suzan's comments:
From the ground:
Mike Corcoran Marvel saddle, M tree: way too small
Black Country Eloquence saddle, M/W tree: too tight in the front
Wintec: fits well in the front; narrow in the back
Lance palpated ouchy on either side of the base of his withers, at the back of the saddle (particularly on the left, there was a very tight structure there; on the left there was a calcification), and around his S/I (especially on right; he nearly dropped when she probed that). His hindquarter muscles were very tight; so were the muscles at the top of the neck (the head-release muscles).
Felt like he was ouch in his front feet, particularly right front, particularly heel. She pointed out that that heel is collapsed a bit, and his toe is long. Lance toes out a bit anyway; need to have the farrier out more often to keep it in line.
The left hind also felt uncomfortable to her. Lance did not want to use his hindquarters, but when she asked for a better effort at the walk he lifted his back, used his hindquarters, and his walk and contact improved greatly. As soon as she asked for trot he flattened out, however. At the canter, he gave her some decent work when she asked for a bigger canter with more back/hindquarter engagement, but when she asked for the trot after that he throttled back quickly rather than benefitting from the correct work. That points to the front feet.
Sore front feet could cause the back/hindquarter soreness as he would brace back there to take some of the pressure off his feet. Back/hindquarter soreness would put more pressure on his lower leg structures, which could have caused the right rear suspensory injury.