[Elecraft] K3 VFO B Knob

[David Gilbert]

There are times when I'd like to spin the VFO B knob on the K3 a bit 
more quickly than its small size allows, or do so continuously without 
ratcheting my wrist.  I noticed that the guy who sells adhesive knob 
dimples also offers a replacement knob with a small crank for the FT-817.

http://www.fingerdimple.com/main/page_ft817_kranker.html

Anyone out there know if the FT-817 knob is similar in size (outside 
diameter, shaft diameter) to the knob used for VFO B on the K3?

Thanks es 73,
Dave   AB7E