Rotation of a group

Hope this is in the correct forum. I’ve followed the eye tutorial and grouped the meshes together so that I can move and rotate them all together. The only problem is that I want to mess around with the position around which they rotate. Anyone know how to do that?

And the other thing is does anyone know if it is possible to link two groups / meshes together (as in if I duplicate the eye mesh group) such that rotation is performed locally on each one but changing the rotation of one changes the rotation of the other?

Shft-G will give you selection options for the selected Object’s group. You can Shft-Select both Groups that way and rotations work as per normal; R, RR, R-Constrained and all of them with period and comma pivot selections as well as the traffic-light “Rotate Object Centers Only” icon.