OK, I kinda screwed up. I started my cycle w/o enough pins to finish it. When I placed the order for the rest, I didn't understand that "needles" was just the tip, and not the whole syringe. Hopefully the new batch of "syringe with needle" that I ordered will show up before I run out, but if not, how bad would it be to reuse the barrels that I have with the new needles? I was as careful as I could be to keep them clean. Washed hands and area where I was working. Immediately returned the barrel to the sterile package it came in and put away in a clean, but not sterile container. Has anyone ever tried this? Is this a terrible idea?