[Avodah] zman hadloko erev Shabbos and motzoei Shabbos

[Minden]

I'm afraid I didin't have the time to read all the interesting posts on this topic in depth, but if you're really interested in the matter and aren't satisfied with second hand ideas of what the XYer Rebbe said the Mogen Avrohm said, I strongly recommend Rav Yehudah (prof. Leo) Levi's very illuminating maamar in his "Halachic Times".

Lipman Phillip Minden
http://lipmans.blogspot.com