Last year I obtained two nice EMs. One is a Williams Big Chief that comes in that weird cabinet with the extra depth at the front. It has two different leg sizes because of this and I suspect it is still not correct because the thing stands head and shoulders above all of my other machines. The other machine is a Sonic Super Straight and it stands about two inches shorter than all my other machines. (Before you ask, the four on the Sonic are the same length as the 2 shorter ones on the Williams. Any reference available on proper leg length here?