Thanks for the tips, JRStriker12! Consistency is something I'm working on, and the same goes for my shots from mid-court. (My slice is usually only floaty when I'm buying myself time.) I've got the serve part in okay shape now, but I need to find a partner (two perhaps: one better; one at my level) to practice productively with and to work on constructing points from my serve.
And I'm glad that your goal of moving to 4.0 was met!