A better laptop stand for bed

I use my laptop in bed a lot, as it's more comfortable for me. However, it's hard to balance the laptop on my chest and type with my hands sideways, so I needed a laptop stand. I found this one , but I'm a cheapskate and it looked simple, so I decided to make one myself. Turns out I spent just over $15 and took 30 minutes in the garage to make it, and it worked great for months! I just made another one, so I've chronicled it here for your building pleasure.

Another commercial stand is the Lapdawg laptop stand - possibly the worst name ever.

Materials Needed:
-wood strip, .75 in x 1.75 in x 6 ft. Just about anything of the right size will do.
-hard board, MDF board, etc - I used MDF the first time due to the clean white melamine coating, but the plain hardboard looked better and seemed more durable.
-two knobs attached to screws/bolts
-two big washers
-two socket anchors
-2 very short wood screws (for the lip)
-4 medium wood screws (for the legs)
-4 small nails
-4 plastic checker pieces (optional)

Tools:
-circular saw (could use a hand saw, but it'd be messy)
-power drill
-(Optional) dremel w/ sander bit

NOTE:
This was made to be simple and quick. You don't really need too many measurements; just line things up and saw away. I only measured the tray itself (11 x 20 in). The rest are self-evident as you're going along. Even the lips were circular-sawed freehand. Be careful where you put your hands! (If you want to keep them).