What I am trying to solve is that, for example, I have these 8 blades positioned evenly in a circle so they create something like a chopper rotor. Now when I want to scale one end of each blade, I have to do that manually for each one of them. Is there any way to put them into some kind of a group so when I edit one, same editing happens on all of them?
All of the blades are one object, I could make them separate, but I find it best to be one object.
try linked duplication (alt D) all the blades wil be different objects but when you make a change to one of them, all wil change.
2)try Dupliverts/faces this wil duplicate a child object to al the vert/faces of the parent object. this meens you only need 1 blade
3)the array modifier ==> note that this will not be handy in your case.
4)if you’re done with modeling and the only problem is positioning and scaling then you could also use constraints.