In all my tunes I change the maf frequency points to be more linear in separation. Doing so reduces the chances of spikes and non regularities between points and also allows me to see inconsistencies visually since that's what I'm used to.
It might not help you may give you some idea.
This is what I have found works very well with the most resolution.
Code:
1485
-647 838
-200 638
-100 538
-70 468
-50 418
-30 388
-20 368
-20 348
-20 328
-20 308
-20 288
-20 268
-20 248
-10 238
-10 228
-10 218
-10 208
-10 198
-10 188
-10 178
-5 173
-5 168
-5 163
-5 158
-5 153
-5 148
-5 143
-5 138
-5 133
-5 128
-5 123
-5 118
-5 113
-5 108
-5 103
-5 98
-5 93
-5 88
-5 83