I found the 37 mm Master Case quite nice, and the problem came with 41mm +++ cases. Too chunky, they lost their " grace ".
Look at the MMR Ti, with its 44 mm case. Gracious? No. But, in this " case ", the overall conceptual look of the Watch works well.
Now, the MUT case, which is not MUT anymore in its 39 and 40 mm version, can be an interesting base for further Master Cases.
And to try to conciliate mascunility and elegance.
Best, John, interesting discussion!
Nicolas