About being too far back in the saddle, that's in part because of his cue to 'back up'. He responds to pushing your seat back, which I still haven't quite gotten the hang of. I also really need a riser for him, the saddle is an awful fit, but he's not my horse so i'm not to sure I want to invest in a saddle just to fit him. The trainer has noted that my seat has shifted back a bit, and we've considered a riser(just not sure if it would fit under my already narrow saddle very well). My seat in the second picture I can see is very back against the cantle, and my heels are actually more down that usual(not a bad thing haha) because i'm pushing against the cantle. Usually with the new stirrups length I'm closer to the second picture, or even a little more forward seated.