[Elecraft] New K3 built - can I reset the 5w calibration?

[TJ Campie]

I finished building a K3 for the radio club at work and I thought I'd take
the bull by the horns and attempt to improve the factory setting for the 5w
calibration on the 100w Bird watt meter I had.  I couldn't get it to go up
the the point that looked like 5w on the meter regardless of how much I
turned the knob on the K3.  The setting ended up at 10 (the minimum) but I
think it must have been more correct from the factory.  I *think* it was up
at about 37 but I don't remember - is there a way to reset it to the
factory setting?  I don't have access to a 5w accuracy meter.

Otherwise, the build went great and was a blast :)

TJ W0EA