Zapotec valence pairs

Working today on valence in San Dionisio Ocotepec Zapotec.  The problem in a lot of these languages is that there are so many different morphological relationships between any two members of a valence pair.

For this variety of Zapotec at least, there are at least the following:

1. Equipollent  (less transitive has a lenis initial C; more transitive has the corresponding fortis C
2. Less transitive derived from more transitive
1. d- replaces initial g-
2. y- replaces an initial C (usually g-, but sometimes another C)
3. bi- replaces tsi- or dzi- syllable
3. More transitive derived from less transitive
1. prefix gu- added to root
2. prefix or infix u- added to root
3. prefix s- or sa- added to root

Here is part of the chart that I am working on: