You are welcome Sharon and Alan. Kind of a "perfect storm" of considerations came together prompting me to get into this. First there was that LuLa thread Alan referenced, then there was the fact that RR asked us if would be interested in reviewing the Etching paper for which their profile used this approach, and thirdly, Josh Holko mentioned his use of polarized profiling in his recent article published on the site. So with all that, I decided this needed a close look-see. I'll be interested in any further comment on the subject; from what I could find, or perhaps better put, not find - it's received little attention in the past.