Is it reasonably possible for one person to remove caster cups, roll a wheeled baby grand a few feet out of the way on a hardwood floor, and then roll back and replace caster cups?
The casters on most grand pianos are not sufficient to move them .best is 3-4 strong ‘guys’ who lift the piano and carry it 'you don’t need to get all the weight off the wheels, just most. And of course those 3 ‘guys’ lift each leg enough to get the cups out.
Strong girls can do this job, but I’ve never seen any try.