It looks like I might be applying again this cycle, and I'm wondering if I can get away with saving some of my old materials from last cycle. I've spoken with several admissions departments, and my rec letters and PS are excellent, according to them. I plan on revising my PS a little bit, but I'd like to keep almost all of it, if possible. I'll probably get a few new recs, but I have one that I'd very much like to use again. Help?