I find that every site has different strengths. Ditto the CAC Forum.
For me, this is probably the best place because of the volume of information I have here on the RWB Saint-Gaudens Book Thread. Many of you have contributed valuable posts there, including of course Roger. It's irreplaceable, which is why I have saved it on my own PC every 5 pages or so.
Good stuff elsewhere, especially from the veterans with decades of experience on grading standards, MS vs. AU, Friction vs. Rub vs. Wear vs. Cabinet Friction etc.....and other similar debates. Though I have no interest in Franklin Halfs, that Franklin Gradeflation Thread at CU was great.