Hi Mr. Gerald_Clark!
I'm used to build LTSP servers with Ubuntu and Debian, LAMP servers and File Servers for small business... But even using Core since version 2, I wasn't feeling confortable to change the working servers replacing the existing distros by Core so I never tryied it before...
Now I have a new project (a charity project) for a small room for children to access internet and learn how to use computers, all machines were donated and my intent is to use Core because in the few years that I use Linux (about 12 years) it's the best distro in many ways following the KISS method.
Maybe you are right, I should not be build servers as I'm more a programmer than a Network Adm... But, well, I'll keep trying!
Thanks again for the help!