Correct Bro. But nowadays in Chennai who is grinding dosa batter at home in a grinder? Most of them depend upon instant dosa batters available in market. Others going to flour mill to grind batter. Nowadays people become so lazy to use grinder also as it involves transferring and cleaning. Earlier in villages people used hand grinders, Now everyone are moving towards lazy.If we grind the rice & urid dhall well in correct proportion means anybody can do good idly anna no need he/she must be from south