I'm currently a third-year undergrad, planning on studying abroad for one semester next year (my last year). I'm currently working on my thesis this semester with a professor who offered to write a rec for me. Since I won't be here next semester, and since I plan on taking a gap year before I go to law school, I'm not sure whether I should take him up on the offer at the end of this semester or after I come back from studying abroad.
Would it be pushing it to ask for a letter so much in advance? I don't foresee myself working as closely with him anymore after I get back though.