rob152,
I think, in situations like this, a person can sometimes over-analyse themselves with respect to others.
It's always tempting to try and get a feel for how you shape up against the competition and ask the "What if?" questions but I think the most important thing is to just get on with it.
Be confident in yourself, your past achievements and your abilities and sell yourself to whoever's listening at the time.
Of course others can give you insight into the details of the selection but try not to get too bogged down in second-guessing the selectors is all I'm trying to say I suppose.
Just my 2p.
Best of luck!
V1R