I don't exactly know how to explain this but I'll try. I have Shimano Disc hubs on my bike and the other day I felt play in them. So I took my QR out and inspected the hub. I could move the bolt that the QR goes through, back and forth (only like 1mm but it is play). So I tightened the two nuts on both sides of the bolt not knowing what I was doing. Then I figured out that bolt needs to spin so I obviously couldn't tighten them to the point where they didn't spin. So then I set them pretty much to where they were in the first place. But then my hub barely spun. It felt like something was holding it back. Knowing that there was ball bearings in the hub, I figured something was wrong inside. So I took it all apart and carefully removed the bolt. I had it over a bucket so if i did drop a ball, it would catch them. When the bolt was out it looked like I was missing some balls. I only had 6 on each side, but it looked like it could hold 10 on each side. Is it supposed to look like its missing some? I had never taken my hub apart before so i didn't loose them. If it is supposed to be like that, how do I set my hub back to normal? I know i have to put the bolt back in and tighten the nuts. But I dont know where the nuts are supposed to be. All the way in? This may be confusing but I don't know enough about hubs to explain it better.