I'm gonna baseline this thread, OP has a ton'a HP5+ and Rodinal, he wants less grain, he tried adding salt and that didnt affect the grain, though he did notice that the 1:100 stand dev with salt achieved a result that he preferred. He's going to print it and see if it meets his needs. If the grain is not what the OP desires oh well, I am sure he will move to a different dev....

Why all the Debbie Downers here? Seems to me the OP is having fun and sharing which studies show are both highly correlated to happiness.....