My apologies, I dont have a complete schematic. I am on holidays now for 2 weeks so should get to doing one up. But the gist is follow the original raduino.
Then follow the BS170 PTT pop fix for that section.
And then there is a simple voltage divider on A6.
A7 is connected to the optional AD8307 meter on the back,
Ill do up schematics and create a new blog page with all the relevant links and such....