Rick,
The ground balancing is extremely simple. Pressing the GROUND BALANCE touch-pad brings up an LCD icon showing the current ground balance setting on the X-50 (the X-30 has preset ground balance). Preset is "6" out of "20".
Raise the coil up and lower it to the ground. If the setting is under compensating for the ground mineralization, the tone will be LOWER as you get to the ground. If the setting is overcompensating for the ground mineralization, the tone will be HIGHER as you get to the ground.
Use the [+] or [-] touch-pads to adjust the ground balance circuitry to obtain no change in tone as it is lowered to the ground and raised back up.
A trick which some users may find useful in bad ground is to go slightly positive; i.e., one number above the point where no tone change is obtained, which tends to enhance performance in severe ground.
All in all, it is quite simple to balance and offers a wide range of adjustment in terms of ground conditions it can compensate for.
Hope this helps.
Andy Sabisch