[Harp-L] TB on the 1 2 & 3

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Ok here here are a few question for the tongue blockers. How do you go about playing holes 1 2 & 3? Do you Pucker them and start TB at hole 4? Do you tongue switch using air to the left side of your tongue? Do you keep the air to the right side of the tongue and by hole 1 your tongue is on the comb? 
I am trying to learn to use tongue blocking and hole 1 to 3 are tough. Pucker maybe best here, but I still would like some input.
Thanks, Tony Stephens

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