How to center a ring of Actors inside another ring of Actors?

A very simple question that probably has a very simply solution that my very simple brain does not know!

I’m planning to create a tower with an inner tower and have spent some time creating the ring foundations of each tower:

The question I have is how can I perfectly center the inner ring within the outer ring?

If I group a ring the transform says “multiple” so that doesn’t help!

I’m sure this is super simple!

Thanks for your time :slight_smile:

You need to align the inner circle with the grid


( in X and Y ). Then it’s easy to align the other also.