Mass and vibration cancelling on top of CD player?

I use low weight cast iron barbell weights (2.5, 5 lbs) to which I glued 1/8" cork on underside.

I don't understand why dead level is so important. It doesn't seem to matter to a gyroscope? I like the cork idea. Probably could serve more than 1 function.

Roxy54, you cannot ensure that the disc is spinning level by checking the level if the chassis. Just saying.

Geoffkait,
How would you check it then? I'm only asking out of curiosity, because I don't really think that it matters that much with my type of transport as ong as it isn't really off.

Generally speaking then, the level should be placed directly on the spindle or another place on the transport compartment that is the same level as the spinning CD. Using the top of the CD player chassis or even the CD tray is unreliable. Unfortunately, unless the player is a top loader the cover of the player must be removed to gain access to the transport compartment. The reason level is critical is that a spinning CD will flutter more if not level, especially when out if round as many are.