cPanel DNS Cluster + Restrictive Recursor

Hi All, I am about to depoly 3 servers, 1 full cPanel/WHM server + 2x DNSOnly servers. The way I want to deploy the servers are like follows: NS1 & NS2 will be the DNSOnly servers. They'll be read-only servers. All DNS updates will be pushed from the Full cPanel server. NS1 and NS2 needs to offer recursive lookups for selected IP ranges. If you can provide my with details on how to achieve this, that would be great. I am aware on how to setup the clustering options on cPanel but a bit lost on how to get the DNS requirements done. Appreciate any and all feedback with regards to this matter :) Kind Regards, Asanka