No, what sounds wrong is your magically expanding nothing that isn’t a medium but is described just like one with the capabilities of movement of ponderable matter.
Which need I remind you is the cause of cosmological redshift in their flawed model, and as they warned you, you were not to confuse the velocity as being a real velocity..... yet you keep arguing for a velocity factor, instead of just accepting it is the medium existing in space which causes all redshift, including Doppler.
Only when you keep treating this frame as an absolute frame while ignoring the ball sees no energy gain....
No, it just affects the light passing through it and causes energy loss which is why the Doppler shift was able to be mathematically derived from the energy conservation laws.
Because I don’t need your magical expanding nothing that moves like a ponderable medium, but isn’t, and is capable of causing objects to accelerate, but doesn’t, that can’t be tested in any laboratory because physics is different way out that away, to explain redshift. Just the same physics we can observe in any laboratory on Earth.
Just all that matter they keep pretending isn’t there, despite the first probe ever sent out falsifying their belief in the matter present right next door..... where we definitely should have been able to observe it, but couldn’t except in-situ.
Because correcting mass estimates would require correcting Dark Matter and so require correcting Dark Energy. More Fairie Dust that can’t be observed in any lab and only occurs way out that away......