My '07 HP has 44k on the clock and I was thinking of changing the belts as its over the five years/70k interval.

Anyone done it themselves? Any tips/guides?

Need locking kit. Not to difficult unlike some belts from what I hear. Don't forget to do the water pump also

I did mine, didn't use locking tools. Old fashion tip ex marking. And I recommend changing the water pump as mine was seeping after 27k, didn't take to long a few hours and I just followed the autodata guide.