Crankshaft bung plugs

[pistonbroke]

Hi Guys, I'm ready to have my rotating assembly for my 255 balanced. When I had the crankshaft turned they pulled the plugs out to clean the oil passages. Now, do I want them in for the balancing or wait until its done so any metal particles can be cleaned out. Thinking about how much they weigh one would think you would want them in when balancing the shaft but I don't metal particulate in my bearings either. Thanks for the help, Tim