I read this article a few weeks ago when I got the October issue of Dressage Today and I was going to post this question then but got side tracked and never got around to it.
The article was on Para-equestrian Lauren Barwick and on page 19 there was a photo of Lauren riding. The saddle she was in looked modified to me, with maybe a second block sitting *behind* the thigh in addition to the traditional placement.
I think my own riding would improve with that kind of support in the saddle. Did anyone else read the article and see this photo? I would be interested in learning more about that modification, if that is what it actually was and not just my eyes playing a trick on me.
I think I rode in a similar saddle in the Paulien Alberts clinic this week. The one I rode had a block behind the leg, like a serious jumping saddle. I think it was on velcro. The front knee/thigh blocks were on velcro, too. The horse had some spooky and otherwise non-helpful moves that jolted me. I think that the hind block was quite helpful and would suggest trying it.
I think the saddle was an albion variety. It was treeless and sat a bit low on the back of the horse in the rear. I added shims to raise the seat level for my rides.
I learned about a number of modifications and adaptions of saddlery at the clinic. I'm working on the report, so you will have more info.