Yes, long lines. You already have the surcingle on order, just add a pair of long lines (or you can use a couple of lunge lines like I do). It only takes a quick check in with a trainer to learn how to long line correctly and then you will have all the ability to collect your horse that you would have if you were on his back (except for weight aids). You can use long lines on a straight line (like driving) or put your horse on a circle. Just remember to keep the forward aids engaged as well so you are not just working with his neck, but also straightening and strengthening his hind end and shoulders. Good luck!!