oh forgot to post that it really does also depend on how other's perform, as was chatting to one of the other assessors on the day who talked us through the scoring process (in brief) it works something like this (the numbers are just used as an indicator ok)
at the end of the assessment day everyone is scored anonymously on each task and there is a minimum number that needs to be achieved to pass the day, say for example 20 points.
They then collate all the scores at the end of all the assessment days and the top 100 (this year) get offered the post, say the top score is 30 but they only have 80 people then they go down to the 29's, 28's and so on until they reach 100. If ppl then drop off by change of mind etc (it does happen apparently) they continue going down the list again... I also read on here that they have actually told ppl in the past that they have scored enough and passed the assessment day but there is no vacancy for them!!! How mean is that lol!!