I'd say your second barrel looks pretty good. And you are correct to say that is is okay to have a larger pocket when you are going slower, because they'll suck it smaller when you add speed.
I would, however, be careful on your 3rd barrel. You are cutting that one close. Push him deeper in the pocket before you turn.
∞•*˚ Βгįťţαňγ ˚*•∞
It is not enough to know how to ride; one must know how to fall.