As I am slowly beginning to understand it does not really make a difference what airlines sells you the xONEx since it is a OneWorld product, not an airline product.
So today I mailed AA in South Africa to book a DONE4 with no flight on AA metal and no stops in the USA. I want them to use my BA EC# for all my flights. I am very curious what the reaction will be. I will keep you posted.
Suggestions are of course welcome.