Man I think I like that  pattern you you just posted is what Im looking for. with some changes of course.

Keep Checkers Just as they are. same shape same angles.

Keep the blue down the center, but at the top by the tank, flare the blue out a little so that when you are looking at it from the side it has a more continuous flow of blue from the tank shroud to the seat.--not sure how to explain it.

Replace the yellow sides in your picture with black gripper---and replace the back yellow in your picture with black gripper as well.  I really like the look of the band around the back---so yes, I am ditching my idea of having the checkers wrap around as I first stated.

Since this is for a thicker/taller desert foam, I could send you the foam to pattern it---or I could send the seat base and foam. Either way.

I may want " Zilla" or something cool embroidered on the back.  Get back to me with cost with and without embroidery.-----someone is going to have to teach me how you did that link.