Just an update...
I believe I have been learning/hitting straight arm forhand for a year now, and it is a bumpy road, up and downs... But now I am pretty confident of my forhand, and it has become a huge weapon, I am happy.
1 question tho. I have noticed that both Nadal, Djokovic and many other double handed backhand players, their non-dominate hand always hold racket throat area when in ready position between each shot. Why they do that? I can understand single handed backhand doing it, but... My non-dominate hand always, always on racket handle and in backhand grip(i am somewhere between continental and eastern-forhand ). Is taht because making take-back as low as possible(to get below the ball)? Can somebody explain this? Thanks in advance!