Re: Required information regarding domain and naming servers
Taken from wikipedia:
"Every domain name must have a primary nameserver (eg. ns1.domainname.com), and at least one secondary nameserver (ns2.domainname.com etc). This requirement aims to make the domain still reachable even if one nameserver becomes inaccessible.[1]"
Which means, you could use any of x10's nameservers as primary ns and any other ns as secondary etc, but if the primary fails, the user will be redirected to a completely different server. And if the primary does not fail, the user has nothing to do with the secondary ns.
So it's actually not useful to not use the default servers.
Real programmers don't document their code - if it was hard to write, it should be hard to understand.