Adding Contect

don't mend what is not broken

[needinfo]

I have a 9 sites which do very well in the Google SERPs (well so far anyway). I want to add the same new page of content to each site. I know that adding new relevant content is a very good thing to do, not only from a SERPs point of view but also from the point of view of any visitors.
After saying all that there is a nagging doubt in my mind, these sites have ranked #1 for my search phrases over the past 4 - 5 months and I am just slightly concerned about adding new pages to a site which is already doing very well, i.e. the old saying "don't mend something which is not broken".
I know a lot of you may think I'm far too paranoid about this, in fact I kind of think that myself especially when I think logically and come to the conclusion that adding new content is only improving my sites.

Any comments at all?

[Birdman]

Well, adding new content is a good thing for your users and Google. But, adding the same new content to all your sites is not a good thing. I would suggest putting the new content on the most relevant site and then link to it from the rest if you believe it is of interest to the users of the rest of the sites.