I bought a grand piano for my small condo

[bnatural]

Hi Folks,

I bought my dream piano - a Steinway - for my rather small condo.  I know the wall between my living area and my neighbour's is only the double drywall with insulation.

I bought a thick wool rug and additional underpading, along with large casters for the legs of the piano.  I keep the instrument closed with a custom made cover over it.  It is somewhat quiet and no one has complained in the past week.  But, I am afraid as I start playing the way i want to on this powerhouse of a piano, that there will be complaints.

What measures can I take to further reduce the sound?  More rugs on the hardwood floors, bookshelves, etc.  I really don't want to treat the entire adjoining wall.

Please advise.

Michael