its a great machine with a slight learning curve.....i didnt quiet understand how gb either.... read and re-read the owners manual and the above posts...it will come to you too.....while in the process of ground balanc ing think of the g e b knob sort of as a volume control on a radio....you are trying to make volume level the same whether the coil is raised or lowered.......i dont know what the soil is like where you live but i find where i hunt the g e b knob usually ends up within one or two digits of where the pre set mark is.... and like you mentioned you can do pretty good just using the pre sets until you master ground balancing...thats what i did....
