I am following the lessons from a finger-style blues book. I have completed practice lessons "A" "B" and currently at "C". When I was practicing "A" I could be able to play it perfectly most of the time. Say 8 times out of 10. Same for "B" and now when I am practicing "C" when I try to play "A" I can play it properly only for about 30% of time. Should I go back to "A" and practice it again to the perfection or continue with "C" and move on?
When I mean I cannot play "A" I mean I forget which note to play after what. My fingering is almost perfect, that is to say I hardly make mistake plucking right string with right finger or alternate base.
What is the general Idea you follow? Perfect something then move on or play it good enough and move on.
NOTE: "A" "B" and "C" are similar and its not necessarily the other chapters depend on any of them except thumb independence and proper fingering.