Editor: creating a new feat

[avetovitz]

I am very very new at the editor, so please forgive me. I am attempting to create a new feat that will allow Ironskin monks to get an armor class bonus based on their constitution modifier. I attempted to create this by copying and modifying the standard monk AC Bonus ability but i cannot find where to change the stat modifier from WIS to CON. I was going to tie the class ability next to the feat using bootstrap. Help please....-