Please crit my form, I'm showing 2'3 hunters this spring. A few of these picture are old but they're the only ones I had. I don't own any of these horses so I don't need comments on them but if you have tips or nything I'd love to hear them. These are the pics with my best equitation. Thanks :) IMG_2822.jpg
We actually have similar seats... and my instructor constantly tells me to roll my shoulders back and keep my elbows bent and flexible. :P Doing that also helps me to keep my chin up and my back in line with my heels.
The main flaw I'm seeing is your hands. You could raise them an inch or two and that would put them where they should be. Raising your hands will also put more bend in your elbow so you don't have what I call popsicle arms. As RoosHuman said, rolling your shoulders back will help keep them back and will keep them loose as well. I would also watch your toes. There are times where your toe angle is fine, and other times where your toe angle is a lot farther than it should be. I also noticed that your back is arched in the first few pictures. This means that your not engaging your stomach muscles as much as you should be. In the last few pictures I didn't see your back arched. In the first jumping picture, it looks like your stirrups were too long and that you were pinching with your knees. Both of these causing your legs to swing back and causing your upper body to move too far forward. In the second jumping picture, your release looks good, your upper body could go down a tad bit more, and you could tilt your chin up a little more. I'm sorry for the long post, and I hope this was helpful. I hope you have fun showing in the spring! :)