Well, to me, as far as spacing goes, the more the knob does, the less space I see...
The EXTRA RINSE is one example: Very Wide... Versus the Temperature, Water Level & Speed: A bit Narrow, but whatever works!
-- Dave (Of which a GE Filter-Flo--& a REGULAR (14 LB) CAPACITY machine--is what Chas. Klamkin recommends in his "How To..." book!)