The knee rolls come in two sizes and I use the smaller size. I’ve also tried the saddle without any knee roll and it was fine too. They attach very well and after playing with their exact positioning I got them just where I wanted them. I’m sorry Major Beale was rude to you. I got to watch one of his lessons and he was very nice to me even though he had no idea who I was. I got my saddle an 18.5’’ from http://www.fine-used-saddles.com/Fine Used Saddles. Finding any 18.5 or 19’’ dressage saddle was really difficult so I was glad to get the Laser. I hope something works out for you.