Forward Zone + Recursion - Queries Time Out before Resolving

OK after lots of googling I found this:

 

https://devcentral.f5.com/s/articles/configuring-the-f5-big-ip-to-perform-name-resolution-using-a-dns-resolver-cache-32688

 

This configuration appears to do what I want.

 

Are there any downsides of this configuration in terms of the DNS profile disabling BIND. It actually seems to work with the BIND Server retained.