Hi, I'm experimenting with de-lidding a pair of (5677) processors for a Mac Pro I have. I decided to experiment with the "vice method" on an old processor I had left over from another upgrade. The de lidding with the vice went really smoothly....the top seemed to slide over a bit at first and then with a soft pop, it just fell off. Now I'm unsure as to how to clean up the processor properly. I tried scraping off the solder with a plastic card, but it's not smooth.. If I used sandpaper or something I'm afraid I'd damage the pins around the edges? Any suggestions for what to do here? Thank you!