Thanks for your input! We do have trails but they aren't ride-able at the moment and our paddocks are pretty flat =/ I have made it a point to do lots of transitions - he has no problem getting up and going but slowing down and collecting is the issue. Today I did walk/trot transitions, figure eights, circles, sitting trot-posting trot alternates, anything I could think of. It helped half way but he still had moments of getting super quick and hurried. Same at the canter - if I'm tracking left on a circle he'll go beautifully but going full-ring or to the left he gets choppy and quick. The only time he'll go at a decent pace is if he's got his head down to the floor and putting all his weight into my hands. He definitely needs more weight and muscle everywhere but mostly his back, neck and topline. Thanks so much for your advice - I guess we've just gotta keep doing what we're doing - patience is definitely a part of the horse world!