[Elecraft] Sidetone source

[Bill Coleman N2BC]

Hi all, recently completed K2 #5290. 

I've made a couple of posts during construction, all the 'bugs' I faced 
were self-inflicted.  Saturday I went directly from final alignment into 
the middle of the NAQP and had a ball. 

Yesterday I was on CW and while fiddling with various menu settings I 
managed to lose my sidetone.  I just figured out that I must have tapped 
DISPLAY while in the sidetone level menu.  When I use the secondary menu 
to select U6-25 I have no sidetone.  The recommended setting of U8-4 is 
fine.

Do I have a bug? (self-inflicted or otherwise)  If yes, should I worry 
as the recommended U5-26 setting works fine?  Why selectable sidetone 
sources?

72, Bill  N2BC  K2 #5290