Hi Stefan,
you're right of course, the layer information is missing in some manuals because it is largely redundant ... In other manuals I included a table of the general layout of velocity layers that applies to most instruments. Here it is:
2 layers: 0-88, 89-127
3 layers: 0-55, 56-88, 89-127
4 layers: 0-55, 56-88, 89-108, 109-127
5 layers: 0-55, 56-88, 89-108, 109-118, 119-127
6 and more layers mostly apply to percussion instruments where the differences in timbre are more pronounced.
I will try and remember to include the general layer information whenever there are any manual updates!
Kind regards,
David Ender / VI Manuals