Mike,
Thanks for your informative posts as usual - I was wondering seeing as though we have your Explorer, your quarter and your ground conditions and their test results and using that as a standard for the moment - coud you repeat the tests with the same quarter pressed into the surface at 90 degrees using same equipment, same ground, same quarter just to see what variation from your flat quarter data you get - granted I know this differs from actual field conditions, ground moisture, time in ground, actual angle, halo formation, etc., etc. but just curious to see what difference an angle makes in this one test set up.