Having trained a whole heap of ATCs over the years, I find that in probably 2 minutes of conversation I can pick those that will or won't make it. The interview part of the intakes is very telling. To be blunt, if you have been told twice you are not suitable, perhaps it is time to move on. Probably the worst outcome would be bluffing your way through then washing out on course. Worse still would be getting endorsed then messing something up big time. (Touch wood)