I have just started using a training fork of sorts.. (running martingale without neck loop) and knots tied in ring leathers. Mostly to see wether it worked as didn't want to spend money if I didn't need to. I have found that in the walk and jog, though he had a naturally low neck set and frame, and could do it with reins at a super length, it helped when he would be rude, and instead of me lifting shoulders up and his head going up also, he instead went down. I used it for 4 days of training and 5th day didn't and his jog and walks were brilliant, low and when I lifted shoulders (probably a more correct term) his head went low. Which was the intended goal. Lope however, he has now been going lower, but once removed, he seems to get a bit quicker. Still perfecting our lope, but its OK. I like them, as it means I can do work over and over and over so it becomes habit, and when I take them away, its drilled into him. Personally im not big on gagets, but this one (training fork) is one that I certainly will keep in my trunk for emergencies. I won't use it all the time, but its one I know works and doesn't take much to get a correct response from. Where as draw reins I find are a quick aid to a bigger problem. Plus I find the fork helps so that my reins don't get to short and I can maintain some length in them.