[Elecraft] K2 PA replacements

[NK6A-Don Minkoff]

The K2PAKIT comes complete with additional replacement bias transistors, 
Q11 and Q13.  Although the K2 does operate up to 7W out (while showing 
15W) , there is no adjustment in a linear fashion with the power knob.  
2W out when showing 5W on the display. Should I replace automatically 
the bias transistors along with Q7 and Q8? That was my plan.  Just 
wanted to check with any experts out there.
Thanks,

Don, NK6A