Digital BW, The Print

Has anyone printed and measured a gray step wedge on the 4800 or 2400
through the Epson driver with no color management?  In color mode, not ABW.

The 4800 is supposed to have good factory linearization; I\ufffdm wondering how
good.

For example, this is how bad my 2200 is using the matte 1440 settings on
heavyweight matte.
Step     Lab       A          B
0.00      95.14    1.02      -3.42     -               b             |   a
L  +
5.00      88.54    -1.00     -6.33     -   b                     a   |
L      +
10.00    82.17    -3.87     -6.17     -    b        a               |
L          +
15.00    76.45    -6.59     -6.67     -  b                          |
L              +
20.00    71.98    -8.82     -6.21     a    b                        |
L                +
25.00    67.85    -10.17   -3.71     a              b              |
L                   +
30.00    63.39    -9.91     -2.11     a                    b        |
L                     +
35.00    59.10    -9.26     -1.81     a                     b       |    L
+
40.00    54.51    -8.26     -0.74     a                          b  | L
+
45.00    50.04    -7.26     0.85      a                             L  b
+
50.00    44.41    -5.69     1.88      -      a                  L   |      b
+
55.00    39.68    -3.69     2.24      -              a       L      |
b                     +
60.00    35.62    -1.41     1.72      -                    L  a     |     b
+
65.00    31.90    0.22      1.22      -                  L          a   b
+
70.00    27.56    1.11      1.32      -               L             |   ab
+
75.00    23.62    1.26      1.56      -             L               |    ab
+
80.00    21.53    1.12      1.73      -           L                 |   a b
+
85.00    20.39    1.08      1.91      -           L                 |   a  b
+
90.00    19.55    1.03      2.05      -          L                  |   a
b                     +
95.00    18.81    1.00      2.06      -          L                  |   a
b                     +
100.00  18.10    0.93      2.01      -         L                   |  a    b
+

Best regards,
John Moody