The real issue with building a Good RF Ground, is that any "Tuned Counterpoise" type system, is just that, "tuned" for a specific Frequency, and becomes very lossy, as you move away from the Tuned Frequency. This is where HAMs get themselves in trouble as they think that a single, or even multiple Lengths of Ground Wires, will act as a Good Low Impedance RF Ground cross a wide Bandwidth in the HF Spectrum. In the Commercial HF Comms that I have worked in, we had to design and build a REAL Low impedance, Wide Bandwidth, RF Ground system, that would cover the whole HF spectrum, and then setup the channelized Antenna Tuner, for each of the installed Frequencies, and Bands to tune the single Antenna for each of those Frequencies and Bands. This allowed the unlicensed or Minimally Licensed Radio Operators to communicate without having to worry about any Antenna Tuning issues, as they were dealt with during Installation. Modern Auto Antenna Tuners have come a long ways since they introduction Post Korean War. The modern Binary Switched, Lump Constant, Microprocessor Controlled Auto Antenna Tuners around today, were the brainchild of of Bill Schilb, of Motorola Fame, who brought the technology west. First to Northern Radio Co. and then to Berlonix Radio. The Technology was refined by Mark Johnson/Bill Forgey design, of familiar Forward/Reverse Power, Lead/Lag PhaseDetector, and accompanying Tuning Algorithm, first seen in the SEA1601, and refined further in the SEA1612C/SEA1630 Autotuners, on which the SGC, Icom, and everyone else's Binary Switched, Lump Constant, Microprocessor Controlled Auto Antenna Tuners are based. These are very good Autotuners, HOWEVER to function properly, THEY REQUIRE, a REAL Low impedance, Wide Bandwidth, RF Ground system. Without that, they get very poor results, in many various band chucks, when tuning thru the whole HF Spectrum. This is fast becoming a "Lost Art" as Commercial HF Comms has become a Dead or Dying Technology. Just Say'en... YMMV....