My handwriting is much cleaner with a fountain pen than a ballpoint pen. Tools matter. It doesn't have to be an expensive fountain pen or paper, a cheap Faber Castell on printer paper works fine.
Of course your voice is going to sound much better on a condenser mic than on a $1 mic from RadioShack, but that doesn’t mean your voice changed. We’re talking about improving handwriting, if you write someone a note illegibly your excuse should not be that you forgot your good pen at home.