Very much enjoyed the article John.

I was surfing the online Soaring archive and came across another
article that seems to address the same question. I haven't had a
chance to read through it very thoroughly but SSA members or others
with piles of Soaring Magazines laying around the house might check
out the April 1981 edition. Article named "Course Deviations During
Cross-Country Soaring" on Page 34.