Possible easy repair? Sigma 50-150 2.8 os

[eMikey]

My lens accidentally rolled off the couch on to the floor. Ever since there is a rattling inside the lens. Also when OS engages, the shift in the viewfinder is significant. The lens is still sharp and the OS still works.

Is this something that might be an easy fix? If i attempt it, my plan is to record the process and to keep all parts in the correct order.

Any assistance is appreciated.

Also does anyone know where I could find the assembly document for this lens. I would imagine it would make things easier.