I've been working with Banjo, my 2 1/2 yr old Morgan, since I got him in Feb. Of this year. He's doing very well at lunging, ground driving, free lunging and liberty work. He saddles and bridles without any problem and is generally very easy to work with. Last weekend I watched the Trainer's challenge at the Mane Event in Chilliwack, BC. These big cowboys were taking unstarted 3 yr old QH colts straight off the range and within 4 one hour sessions over 3 days were riding them. Banjo is the same size as these colts, and quite well developed as he was gelded late. I am tempted to begin sitting on him for short periods, just to get him used to it. I don't plan to do any real mounted training till he's 3- maybe just walk around the pen once or twice so he gets he idea, but is it possible to do him harm if I start sitting on his back too soon? The vet says he is definitely developed enough to hold my weight and I know he is quiet enough not to go bronco on me- just wanted some input.