Glad to hear you got out of your indoor. I can't stand being inside either. What I noticed the most was that your horse braces against the bit and does not give to it to the point where she in connected over his back. I would suggest riding about a zillion walk-trot transitions until you feel him start to push herself into the trot from behind. You'll know he's doing it correctly when he doesn't throw his head up at the initial trot transition and just moves smoothly up into your hands. Also, your reins will misteriously become shorter since his frame will become shorter once he starts using himself more from behind. Pretty horse! You two make a nice pair.