If you want to build a DIY MacBook Pro Wood Support, you can see this tuto. You can find sketchup plans at the end of this Instructables.
Step 1: Draw Lines in Your Wood Part & Cut It
You can see in the plans, the sizes for the lines, and the drawing part.
I draw the Two parts in the same wood plank.
After Drawing, you need to use a Jigsaw to cut the two parts.
Step 2: Cut 3 Battens, and Assemble the 5 Parts
You need to cut 3 Wood battens at the right size ( 210 mm )
After your cuts, you need to assemble the 5 parts like in the picture, with screw and a screw driver.
After the assembly, i used a special shade oil for my wood.
Step 3: Finish & File
After a few hours of waiting (only if you used a shade oil, or other), you can take your DIY LapTop Wood Support !
If you need, you can download the Sketchup file to read/write/transform as you want.