You can probably just leave the Zener diodes out. At least in the first run they were connected to the wrong place (signal instead of CV), and they don’t really do much of anything in the right place. This is from the discussion of the 1184 but it’s the same issue:
The BOM calls for a BZX55C2V0 which is a 2.0 V Zener, the Tayda one you show is a 2.4 V so isn’t equivalent.