This problem is obviously worthy of closer inspection and the first step should be to conduct a survey amongst South African pilots....we can have a questionair printed up which could then be sent out to them in:
Kenya, Botswana, Tanzania, The Congo, Nigeria, Namibia, Hong Kong, Singapore, Malasia, Indonesia, Australia, New Zealand,The UAE, Saudi Arabia, Kuwait, Europe, The USA and Canada....
you know...we could be on to something here.....