List of 81 unit vectors:
(You can copy and paste them into the DW-MRI signal generator.)

0.1639 0.5115 0.8435
0.1176 -0.5388 0.8342
0.5554 0.8278 -0.0797
-0.4804 0.8719 0.0948
0.9251 -0.0442 0.3772
0.7512 -0.0273 -0.6596
0.1655 -0.0161 0.9861
0.6129 -0.3427 0.7120
0.6401 0.2747 0.7175
-0.3724 -0.3007 0.8780
-0.3451 0.3167 0.8835
0.4228 0.7872 0.4489
0.0441 0.9990 0.0089
-0.1860 0.8131 0.5515
0.8702 0.4606 0.1748
-0.7239 0.5285 0.4434
-0.2574 -0.8032 0.5372
0.3515 -0.8292 0.4346
-0.7680 -0.4705 0.4346
0.8261 -0.5384 0.1660
0.9852 -0.0420 -0.1660
0.1712 0.2576 0.9509
0.1471 -0.2885 0.9461
0.3797 -0.4582 0.8037
0.7994 -0.2011 0.5662
0.4179 0.4087 0.8114
0.8135 0.1198 0.5690
-0.1324 -0.4364 0.8900
-0.5839 -0.1421 0.7993
-0.0942 0.4305 0.8977
-0.5698 0.1788 0.8021
0.3050 0.6751 0.6717
0.5085 0.8394 0.1919
0.3117 0.9494 -0.0368
-0.2269 0.9724 0.0539
-0.0115 0.6886 0.7251
-0.3465 0.8759 0.3360
0.7411 0.6696 0.0494
0.9332 0.2164 0.2870
-0.6260 0.7279 0.2798
-0.7667 0.2889 0.5734
-0.0727 -0.6976 0.7127
-0.4225 -0.8478 0.3207
0.2438 -0.7111 0.6594
0.4325 -0.8842 0.1766
-0.6879 -0.6747 0.2673
-0.7896 -0.2304 0.5688
0.6792 -0.7330 0.0370
0.9103 -0.3028 0.2823
0.9929 -0.0448 0.1098
0.9025 -0.0360 -0.4292
0.4092 -0.1887 0.8928
0.6587 -0.0357 0.7516
0.4236 0.1360 0.8957
-0.1088 -0.1666 0.9801
-0.3772 0.0084 0.9261
-0.0945 0.1581 0.9830
0.2455 0.9391 0.2407
-0.0747 0.9527 0.2947
0.1245 0.8414 0.5259
0.6798 0.6560 0.3279
0.7940 0.3865 0.4692
0.5588 0.5583 0.6132
-0.4784 0.7054 0.5231
-0.5620 0.4443 0.6976
-0.2792 0.5940 0.7544
-0.1585 -0.9475 0.2778
0.1617 -0.9612 0.2238
0.0495 -0.8583 0.5108
-0.5391 -0.6696 0.5108
-0.5995 -0.4054 0.6901
-0.3311 -0.5804 0.7440
0.6192 -0.7190 0.3157
0.7565 -0.4632 0.4616
0.5070 -0.6161 0.6028
0.9755 0.2201 0.0047
0.9218 0.2253 -0.3158
0.8613 0.4894 -0.1366
-0.9524 0.3052 -0.0000
-0.8986 0.3000 0.3205
-0.8150 0.5609 0.1459