Retake a 27 Writing?

HI all,
I’m debating if I should retake the ACT with writing. My first test in February I scored a 35 composite (34 E 35 M 36 R 34 S) and a 27 on writing. My second test I scored a 35 composite (35 E 35 M 34 R 35 S) but did not take the writing. I’m planning on majoring in Mechanical engineering, and the two most prestigious schools I will be applying to are Vanderbilt and Columbia, but with my high composite, I don’t know if I need to bring up my writing score anymore. Any advice?