[Elecraft] KX1 and EFHW antenna

[Sante - IK0HBN]

Hi all,
there is a plenty of schematic about End Fed Half Wave antenna, but 
all them are within the range 40-10 meter. Is there one of you who 
was able to run it with a KX1 in the range 80-20 meter? The idea of 
getting a wire hanged somewhere, without long radials if not a 2-3 
meters counterpoise is very intriguing.
BTW with the internal tuner, should KX1 be able to match it without 
another external tuner, just to make things simpler with few things 
to bring along?
Ciao
Sante