Thank you again. I'm still trying to get a hang of Kerkythea which does get easier with time. The key like most everything is practice, practice, practice.
I added a tutorial for the cushion above. Might get to the piping later today or tomorrow but for now it's as simple as using the line work from the component sections for the cushion (see skp file) and using Lines to Tubes. The centerline of the tubes and piping is the same line(s)you'll find around the component. It's a simple matter of copying and pasting the required line from the component.
Make sure to weld the line work before creating the tube. Also, just make one tube (piping) section which you can convert into a component. There would be two piping components for the tufted area and one for the perimeter of the cushion (top and bottom).







Update 1:
18" Built-In Dishwasher




