Not sure what the rules say about soliciting conversion services. Typically it's okay to discuss technical aspects of digital conversion or to mention/describe conversions you've done yourself (or conversions you've heard). Not okay to provide download links or links to sites where such things are available. Anything in between--like the current thread about YouTube 5.1 channels--is a gray area, I think.
It would be great to have a permalink in the navigation bar and/or on the site landing page to a page where all such QQ-specific rules are spelled out. Right now the "Terms and rules" page only contains boilerplate Terms of Service language that would apply to any XenForo forum.