Sentence:  Neither his <WSD>sure-handed</WSD> scoring, however, almost too <WSD>sure-handed</WSD> for a young man of twenty-five who is going to be a real composer, nor the diffuse and improvisatory character of the composition inspires the confidence in Mr. Bernstein's original gifts that this reviewer entertains towards his genius as an executant and an interperter. 
Meaning of the word marked with <WSD> tags:  Skillfully executed