Billy, to detune my tower from my 80 and 160m 4 squares I put a drop wire from the 60' point on the tower to ground but through the MFJ-931 artificial ground tuner first then to ground. I would put RF into either the 80 or 160m array and tune for zero current through the MFJ unit. The same tune nulled out both arrays interaction with the tower. Worked very well. Peter W5PS