Hey dakota! Hope yer gettin it figured out!! And yes, bb = ball bearing, and Kurt is correct, I painted my dogbones flo. orange so I could find them if they fly out.. (But ever since I added an  "o" ring, in the drive cup, they've not come out! (knock on wood)    Also, if your gonna paint your bones, paint them white first, then whatever color ya want.. I only had flourescent orange on hand, and it seemed like it was going to take the whole can before it started to show up over the black metal.. Oh, and make sure there clean first too.