SSW I'm glad you can see that it really isn't the "normal" to use a 10 on the backs of cockers or schns. Even doing an all over clipdown with a 10 isn't the normal. Unless of course, you have a seriously severe matted dog. In those cases that may be required.
One of my biggest gripes when I hired a groomer, whether they were trained at a school or worked for someone else for training. When i tried to show them a new technique or a different style, it was always "I wasn't taught that way". Just because you were "taught a certain way" doesn't neccessary mean it's the correct way.
Even after all the years I've been grooming and my success in the show ring with my poodles, I'm still learning new and different styles and techniques.
i worked for 10 yrs by myself, didn't change until i found this forum I've picked up so many new things, some I 've tried and have incorperated them into my business grooming pets.