Aggregates on BPC generated Cubes

Hi,

We are on BPC10,Support pack 10.

I wanted to create aggregates on BPC generated cube.Anybody have implemented aggregates on BPC generated cubes?

We are not doing full optimization,as we have transformations on for retraction.

My question here are, Aggregates have any negative impact for BPC functionalities?

After creating aggregates in production system,if we import other tranports,these aggregates would be removed?

Thanks,

Manohar