When I did the math the spring load was right at 93 pounds, but the 90 # springs just didn't get it and the 120's were basically neutral. I'm hoping the 150's do it for me. The nice thing about the spherical bearings is they are really low friction. Yeah at 300# I would have the same concern. Great color, what is it? I'm painting mine PPG Punaluu Stone it's in the same family as yours. Even my dash is similar, go figure.
retroron