I'm not sure i agree with you LeeD. i think as long as your backhand topspin and slice grips are not too different than you should be ok in my opinion. So eastern backhand (1st bevel index knuckle-8th bevel healpad) and continental aren't that far away. Only 1 bevel or so.
Changing grips is easy as I always hold the throat of my racquet with my non-dominant hand during my shoulder turn.
Disclaimer: I'm NOT a coach...
Real tennis: https://www.youtube.com/watch?v=yDqnkLJ9BtM