Persichetti Exercise 3 - 51 for String Quartet

I am reviewing Vincent Persichetti's "20th Century Harmony" and just finished chapter 3!  And so I decided to do the first exercise that looked good to me to try to make an actual piece of music out of (I don't like exercises for their own sake - I think I should always be trying to make living, breathing music).  Here is the prompt for the exercise:  "12.  Harmonize the following melody in four string parts using dominant seventh chords exclusively.  Much contrary and oblique motion and several inversions should be used."

Like I said, I tried to make an actual piece of music out of it and not be too much of a stickler to the rules.  I also tried to approach it not like a chorale exercise - let me know if I've succeeded on that front!  Thanks for listening and I would appreciate any suggestions, critiques, comments or just observations!

It sounds very good, very musical and coherent.

A fun exercise, and very expressive! I think you should take this idea and turn it into something. Love how you ended it!

It sounds really fluid given a dominant seventh’s function is to push the resolving process and continuous dom 7th chords really is like keeping the tension at the very end. I have a thought is that, the theme would be really fit for imitations between the four instruments, one minim apart! But that may defeat the purpose to keep dom 7th chords only haha.