Uou might need a magnet to pick up the old BB's from the DS, depending how gunky or dry the grease is. It's rather hard to really examine the race of the fixed cuo without removing it, but I guess you could shine a light in there and hope you have better eyes than mine. (likely)
You can use grease to hold the BB's to the spindle when reinserting. Have the adj. cup packed with the bearings and ready to spin back on.