Thanks again guys!
I wasn't able to get a video of my ride, but we worked on some of my issues. I brought up my leg position to my instructor- I don't think she wanted to shorten my stirrups just yet, but I did work on the position of my seat and entire
leg. Definitely felt a difference; I wasn't on my butt-bones so much and I concentrated on bringing my entire leg back. Heels down too!
It's going to take a little while for it to be second nature for me... I naturally fell back into my chair seat pretty often, but I caught either by my instructor or by the feeling of my posting. When my leg is back, my knee not so tight, and my heel down (seems like a lot to think about and fix at once sometimes
), I can control my posting better and have a much softer landing. Small change but it makes a big difference!