You're obviously right...

I just wanted to emphazize that whatever the time you estimate,
increase it to be able to handle all the possible problems which may arise.
(Furthermore I've whitnessed that almost everybody tend to be too optimistic when estimating...)

You won't lost a penny if you are thru before the deadline.
But being late is always VERY unpleasant.

"Only Bad Coders Code Badly In Perl" (OBC2BIP)