My tree currently consisted of 9 servers, 3 are 6.5 servers and 6 are 5.1

Presently one of the Netware 5.1 servers is setup as a Single time source
and polling outside source to keep time insync. All other servers are
setup as Secondary time sources.

I am wanting to make one of the 6.5 servers the Single time source, and
change the current single to secondary.

We donot have IPX installed on the 6.5 servers so I want to make sure
this is not an issue, plus looking for advice on how to do this.

Looks pretty easy , so I am thinking I must be missing something.