One thing that always bugged me about using pens in my Expression is the super short limit on pen length. I love the Staples mini gel pens, and I've gotten pretty good at shortening others, but some (like Sharpie paint pens) just not feasible to do this with.
One video on YouTube shows someone with a Personal model who removed the keyboard which allows a full length pen to be used. Unfortunately, this requires removing the end caps which is kind of a hassle. The Create is even worse, the body of the case extends underneath the keyboard and completely eliminates the option altogether.
Anyhow, with the help of a friend at the hackerspace the other night, I finally figured out how to do this EASILY on the Expression.
Here's photos showing how:
Using the head of the special tool, slide the latch towards the rear of the machine. It's pretty stiff, but don't worry about breaking anything. You could also use a flathead screwdriver for more leverage.
Once the latch clicks, lift up on the left side of the keyboard. The right side is just held down by some plastic fingers in holes in the case and will release when you move the keyboard a little to the left.
Taking care not to tug too hard on the wires, you can now lift the keyboard up and out of the way, eliminating any length limit on pens. On mine, the power wires on the right side were especially short. Taking the right side endcap off allowed me to release a bit more wire, but it doesn't really take much.
Reversing the process is pretty easy, just tuck the right side back in the holes, press the left side down flush, and use your special tool in reverse, this time to pull the latch back towards the front of the machine until it clicks.