James,
yes, you've slipped back into old habits with the vocals.
take a break, rest and then get back to it - you know how to deal with those issues.
Interesting lyric and tribute. The humming tells me you could sing this mate...you ought to.
As to Ms Mitchell I'm probably alone in REALLY not liking her.
I appreciate her talent and the absolute fanaticism of her admirers but she leaves me cold.

Cheers
rayc
"What's so funny about peace, love & understanding?" - N.Lowe