Put a rag in the bottom of the case and on the shop floor before you loosen the clutch hub. Those loose roller bearings have a habit of bouncing off into Oblivion when the clutch basket is pulled off.
Some years back I made a simple tool to deal with the issue of errant rollers:
At one time I had some images of the tool in use, but I can't find them so I'll just have to describe it.
1. Attach clutch hub puller as usual and pop the clutch free of the taper.
2. Leave the puller in place, and drop the tool over it as shown:
3: Tighten the thumbscrews against the hub. At this point, the hub and basket are locked together and you can remove the whole thing as an assembly and move it to the bench without dribbling rollers all around your shop.