Parametric hole generator?

I am a complete newbie. I have completed the basic build of my hobby XYZ mill (a Fireball V90) and I wish to put a grid of t-nuts under the MDF spoil board to use with a clamp set. The only precision machine I have is the fireball itself, so I would like to use it to "drill" the holes for the t-nuts, by temporarily mounting the spoil board upside-down. Holes will on 3" centers. Each hole will be a 1"dia, 1/16" deep outer hole, a 7/16" dia, 1/2" deep hole for the collar, and a 3/8" dia hole all the way through the 3/4" spoil board.

I have some wood routing bits, including a 1/2" end mill and a 3/8" pointy plunge bit. I'm fairly sure the 1/2" end mill should be able to make the big shallow holes, and the other bit should be able to do the rest.

Is there a program that can generate the Gcode for this from the parameters? It seem like gross overkill to do this in a full-up 3D CAM program.

Before you ask: yes I do have a drill press. However, it is so small that it cannot reach anywhere near the center of the spoil board.

I realize that the fireball cannot normally reach the sices of its own spoil board, but I can easily build an offset tool holder to solve this forht elong sides, and I can easily offset the board for the short sides.

Take a look here...

wiki.linuxcnc.org/cgi-bin/wiki.pl?Simple_EMC_G-Code_Generators

or perhaps...

www.linuxcnc.org/index.php/english/compo...iew&catid=40&id=7914

Rick G