[Elecraft] KAT100 & KPA100 question

[Leo Starrenburg PA5LS]

LS

just completed the KAT100 and put it in the EC2 with the KPA100.

Allthough I am a bit puzzled by the extra alignment step of the KAT100 (120%
of resistance value of R4, which leaves the trimmer positions totally
unequal), I performed them as required.

Beeing the first to admit that my powermeter is inaccurate, it displays
about double the level I set at the K2, while the alingment of the KPA100
went fine with this meter.

The difference between tuning (AUTO) at low- and high levels: low level
seems ok, high level (~25 instead of ~7 Watts) not only sounds very
different, is doesn't reach the same level / amount of tuning as with low
level.

Where did I go wrong ?

TIA 73' Leo.