I had to go and check out that site. It is very good. Thanks for the suggestion.

Oh, I checked my sitbone distance by taking a piece of printer paper and placing it on a yoga block and then sitting on it like in a riding position and then measuring from the center of the depressions. Sitting straight vertical gave a 115mm distance and leaned over gave a 110mm distance. So it looks like that I need a 145mm saddle just to be sure that it is not too narrow. My current saddle is 155 mm.