Worlddrknss her are my Cablenut settings. I am on Verizon at 1.5/384 in Upstate NY, and they seem to work well.
CableNut Custom Settings File 1.0
win2k
127776
49152
1
200
480
640
819200
64000
150400
0
12800
32
4096
1
1
0
127776
8000
16384
5000000
1
2
0
1
3
100
80
1452
1452
30
0
127776
10
8
64
0
6
240
I have a Westell 327W router.