I envy you, being able to start construction on a new cabinet! Fun and exciting times await you!
I used the Centipede dimensions provided by Jakobud on his website:
http://www.jakobud.comThe only change I made was to extend the control panel out by a couple inches to pack in all of the controls and give my palms a place to rest.
If you can't plot the drawings, you may want to go get a roll of butcher paper like I did and lay it out on a table. Transfer the dimensions using a long ruler and a t-square. This will help get you familiar with every side and angle - it'll also allow you to plan for things such as a keyboard drawer and whether or not your monitor will fit. Plan, plan, plan!!
The other benefit of having your plans on paper to exact scale is that when you get your big boards of MDF, you can just lay the paper over the boards, poke holes through them to mark the corners, and then pretty much play connect the dots with a rotary saw and jig saw.
Chances are your lines won't be straight, so get a palm sander too - it'll smooth everything out and is pretty good at making curves as well.