Pulling content from a private link network site & using it on my main +301'ing the domain

I am wondering if anyone has ever tried taking the entire content from a private blog network site and using it on their website that was previously linked to on that site. There will obviously be some footprints etc, but after the 301 and adding the dozens of pages of the content to my relevant authority site, I think it might be a better use of the site. Paying hosting and wasting money on this private blog seems less beneficial than all of the content being on my authority site where it will actually bring in good traffic. Has this been done by anyone? I'd hate to send up any red flags, but I'm trying to clean up some blackhattery before I get slapped and put my content to good use.

Well, I did it (sort of) and the results so far have been good. I removed all of the links that headed to the target site. Then I took 1 article from the PBN site and 301'd it to the same exact article on my authority website. The article ranked 44th on my PBN on google. The article now ranks 4th on my authority site. I'm taking this as a sign that I can continue redirecting the entire contents of my PBN site and essentially recycle my content. Then I'll redirect the whole website to my "pillar article" which this PBN site was created for to begin with. This authority website does not need a PBN anymore. I get good natural whitehat links and have decided to go pure whitehat here.