I posted on this antenna on eham review not long ago.
Right out of the box and up in the air—– no trimming at all.
SWR about 1.5 to 1 on all 3 bands. I’ve had good experience with other LNR
end fed wires . A bit of wire trimming was needed.
But this one needed no adjustment: 25 ft rg174 coax attached to the tuner box
at 8ft height and the far end at 20ft.