Originally Posted by EvilDrummer
This sounds to me like complete waste of valuable practice time
It might sounds
like a waste of time at the first degree, because it's not directly linked to drumming exercises.
But Simon Phillips, who's totally ambidextrous on the drums, achieved his goal by doing exactly that, doing all the repeated actions we do everyday with his left hand, getting your hair done, brushing your teeth, writing, and so on. Doing as many things as possible with the left (weak) hand day after day after day, as well of course as practicing the drums with a similar approach. Simon was a right handed drummer, he decided
to become ambidextrous in the very early 70's.
So no, it's not a waste of time, it's another source of improving the dexterity of the weaker hand.