What a shame you missed the EEG Spring Weekend at Green Park - it was all about grids.
Some general information is available in the EEG Encyclopaedia of Dowsing Terms entry on
Earth Grids.
The Curry is thought to be more detrimental than the Hartmann, particularly where a double-negative crossing coincides with a crossing of water veins. In that sense they interact with water.
I haven't dowsed individual lines on either grid to see if they consist of 9 thinner lines, but they do dowse at around 9 inches wide. But since most energy lines are constructed from smaller bands, I wouldn't find it surprising if the grid lines were the same.
Grid lines generally run straight, but I find that the lines can get closer together in spaces with geopathic stress. Dowsing the grids in such cases is a good indicator that something isn't right. When the GS is removed, the grid spacings return to normal.
Spacings can also be affected by high voltage power lines and mobile masts.
