@Pat42
In regards to your question about preparation for the competencies for stage 3. Its quite hard to think of an example for Spatial awareness and everytime I have discussed this with interview experts they seem to think that any example - however you percieve it as weak - is a strong one. Can you think of any times (personal or at work/school) when you have had to build a mental picture of things to make something work? Parallel parking requires a lot of spatial awareness, unless you do it by stickers in the window like I was taught! You can apply the same logic to the other examples that are harder to think of. But whatever you do, make sure you tell the example from personal experience because this being a competency interview, they are sure to delve deeper into the situation and ask you specific questions about it.
Anyway best of luck Pat!