I got out of S&S a few months ago and although I would have got more if I had left it til now, the relief of having the cash in my pocket was worth it.......it would have been more of a dilemma if I'd wanted to reinvest (given the poor cash rates) rather than spend
all the above plus....
if you need it in 8 weeks you should already be thinking about withdrawing it soon. You've probably had a good return over the past 6 years (post 2008 recovery) and if it matches your expectations/needs/hopes then why leave it a bit longer in the hope of squeezing a bit...