The elements are now folded somewhat more artistically for my 40m band dipole.
gnuplot> load "gnuplot1.txt"
Freq [MHz]=7.026
V1=2.836
V2=2.544
Cursor 1=1.84e-008
Cursor 2=4.52e-008
vratio=0.89703808180536
phase1 [deg]=46.540224
phase2 [deg]=114.327072
abs(gamma)=0.755401024840705
swr=7.17664914048597
cz={9.18797000120047, 27.8663957175412}
This time Zant is estimated to be 14.025-49.337j [ohm].
Using the internal antenna tuner of ICOM IC-7410, the VSWR becomes close to 1.0 after tuning.