Thanks Walt,
I got it working, vanilla, 4 char partitions. Thinking of going to 5, just to save screen space.
and I also use the Author_sort tweak as you do
I must be

in file things in phonebook order.

That's 'Library order', since Libraries have been around a LOT longer than the Telephone
@chaley
The notes for this tweak could probably use some simple samples of alternate values, like most of the other tweaks do.