OB - good comments. I probably haven't given it enough of a chance. It's a tough one for me.
I agree I have rarely been able to get the correct feeling of extensor action, nor have i been able to really get teh frozen right wrist, love theidea of softening up the left side, most traditonal golf learning i.e taking swings with jsut the lead arm and hitting shots have lead to a very firm left side making EA feel stiff
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If the right wrist flattens at or around impact, you will suffer from trajectile disfunction.