You are very perceptive. When you play in certain keys later on your brain will tell you which fingers to use at that moment.
Hahahaah
I'm so glad i came across this.
Earlier today i was practicing those cool chords& was trying to play them without the thumbs!!! it proved impossible.
But I tried 2 avoit them where I could & i found myself using the #"4" finger alot, which i hardly ever use.
Thanx 4 the sound advice..I could already feel the progress coming.