Do I need to alter 3D Content Central Files???

I am just now beginning to download sldwrk files from 3DCCbut Ican not find the specific sizes of the parts I need. Rightnow I need a 1/2" female rod end, but there are only twosizesavailable on 3DC.  Am I supposed to make adjustments totheparts myself?  The drawing for one of these rod endscontainsover a half dozen equations so I just assume I can make onechangeand the subsequent items on the tree will adjust themselves,butit's just not working, and I am terrible with the equations.

I can't upload the file but it can be found under thecategory"Rod Ends", then in the subcategory "Ball Joint andRodEnds", and the specific part itself is "any femalethread/plain ballend" file.  It's only a 1/4"and I guess I need help tomake it 1/2" if that's how it mustbe done...  I certainly hopeit isn't.   

Justin SolidworksGeneral