I do not think your stirrups are too short really (if you are thinking of showing in the hunter ring). The problem is you have shoved your leg out in front of you instead of having it underneath you.
There really is no way to get your weight down into your heel when your heel/foot is shoved way out in front of you. Bring your leg back so you have your heel under your hip.
In some of the photos your are pinching with the back of your leg. (Something I default to way too often, sigh.) Try to keep the contact more with the inside or your leg.
Maybe it is the boots but it looks like you have your stirrup shoved too far back on your foot. The stirrup should fall at the ball of your foot. This might be adding to your leg/heel problem.
It is much more unlikely you will have piano hands if you close your fingers.
Hmm, it might just be the boots then, because the stirrup felt to be on the ball of my foot most of the time. I never noticed that I was pinching with the back of my leg, I will definitely work on that.
To get back on topic, you have an absolute great eye. You really need to collect more instead of running at the fence. Sit back and put weight into your heel and lower leg. Make sure you get your leg at the girl, stay supple in her mouth and keep your eye up. I thought you were a bit ahead of yourself when approaching the fence, tho I did appreciate the distance you set up with the pole post fence. It's a great way to help focus on your position while your horse gets the right stride every time.
I suggest you go back to trotting up to your fences and going back to fences. Also something that was hard to judge, but are you on even ground in your picture? I know your arena is on a slope, so it did make me wonder if you are on a slop when approaching your fences?
You guys look absolutely lovely otherwise. I really envy the area you live in. The houses are absolutely beautiful out there.
He gets excited at the approach to the fences; I'll have to try to collect him up more on the line before the jump. When he gets overexcited, I usually maintain a circle at the canter until he gets back on track and focuses on what I'm asking, and then approach the fence. I'm going to give him the rest of the week off from jumping, but next week I will work on trotting up to the fence.
The entire arena slopes away from the jump, so the whole fenceline where the jump is is on even ground, but it slants upwards as I ride parallel to it.
Everyone who lives in Ohio wants to get out
. It is beautiful, though.