From Kummer – p. 35

Of course he is fortunate, if the possession of a good instrument having a clear and full tone and answering readily to the bow on all notes, favors him in the attainment of this object. But if he relies solely on this accidental advantage, thinking that it will obviate the necessity of careful study to obtain a good tone,and that by mere physical force he will, after all, be able to produce the power and fullness required, he will be easily surpassed by others, less favored with regard to the quality of their instrument but knowing how to manage the latter more skillfully…

Although since I wrote that particular tweet, I found that it will indeed take careful study to get a good tone out of this other cello. If I’m not careful, it sounds too tinny. I might play a bit closer to the bridge and slower. Experimenting is fun.