Rob G and I spent a month+ last October/November emailing and me calling to sort out the truly messed up CS3.7 that I had bought used. He helped with speaker design diagrams and hand held me on repairs and diagnostics remotely. Along with advice on the tools to buy.
If he was not available and willing to help I would have been stuck with an an expensive damaged speaker with no way to fix. The CS3.7 shipping boxes I had were like paper and no way I wanted to use them to ship them to Rob from California home.
He is difficult to get a hold off but I was doing all of this during the thanksgiving holiday time period.