Prepositions

Q. My question regards the use of “as per.” Example: “As per your request, I enclose a check.” This use has always sounded redundant to me, and pretentious. Isn’t it more correct to say, “As you requested” or “Per your request”?

Q. I do not know how to deal with a sentence with two prepositions very close to each another: Drill pilot holes through the bottom and top panels into the side panels. Everyone at my workplace thinks I should add “and” so it reads: Drill pilot holes through the bottom and top panels and into the side panels. I have five people saying to use the “and.” I’m truly torn.

Q. Dear Sir or Madam, I’m having a disagreement with a coworker on a particular subject, and as my CMOS is at home, I can’t go to it for a ruling. I’m arguing that the prohibition against ending a sentence with a preposition is an invalid injunction—one that often serves to confuse and befuddle the reader by forcing tortured and mangled word placements. She says that the “rule” must be followed. So, is it appropriate to end a sentence with a preposition? Thank you.