[Elecraft] Elecraft] Sub-RX Feature or Spilt Operation

[ni0c]

N1RJ wrote: "My old TS-940 had the same thing only they called it T-F button. It was
a pain to hold the button in for very long. I thought the up/dwn buttons
on the mic were rather silly with a big VFO knob just inches away so I
brought the T-F button out to the mic jack. Since I use a Heil headset,
I made a small box with 3 pushbutton switches. 1 for PTT, 1 for VFO A/B
switch and 1 for the T-F function (listen on VFO B). I could just sit
back with the box in my hand and not have to reach up to the radio.
Worked very well!"

My TS-850S had the T-F switch brought out to the optional RM-1
 remote unit (about the size and shape of a computer mouse). 
This was very convenient.  (Hint, hint, Elecraft)

My understanding of split operation with the K3 (without the sub-RX)
is that it works exactly the same way as the K2.  Is this correct?

73,
Chuck Guenther NI0C
K2/10 s/n 5853