Absolutely stunning work Cath!
Hi Ken, I was surprised to find when discussing dynamic hair with Wendy on Facebook that a lot of the dynamic hair sold in DS stores is actually card based and not fibre based so they are actually using the standard dynamic modifier that is used on clothing. I must admit I had thought some I owned were fibre but when I investigated they turned out to be card based.
I have used card-based hair in cloth sims for years, but the problem (in Poser) is the collision quality with the head and body. I always end up with hair inside the head and/or body. Cloth sim in Poser is like 20 years old now, so maybe that's why. In DS they got something that is more up-to-date with nowadays standards, so I bet it works properly there.