notehead black metrics

From bravura_metadata.json:

        "stemThickness": 0.12, 

        "noteheadBlack": {
            "splitStemDownNE": [
                1.056, 
                -0.312
            ], 
            "splitStemDownNW": [
                0.1, 
                -0.436
            ], 
            "splitStemUpSE": [
                1.256, 
                0.412
            ], 
            "splitStemUpSW": [
                0.308, 
                0.372
            ], 
            "stemDownNW": [
                0.0, 
                -0.184
            ], 
            "stemUpSE": [
                1.328, 
                0.184
            ]
        }, 
=============
I multiplied your numbers by 250, to convert back to font design units.
stemUpSE[0]: 1.328 × 250 = 332
stemUpSE[1]: .184 x 250 = 46
stemThickness: .120 × 250 = 30
=============