The master meter was a fixed 420px, but each sound bay's ladder fills its column — on a wide
window a bay could be longer than the master, which is the opposite of what was asked.
Master now stretches between 420 and 760 px, and the three bay ladders cap at 320 with the same
cap for each, so they stay the same relative size to one another and stay shorter than the
master at every window width.