I bought a VESA mount arm from Ergotron. I wanted to be able to reposition my laptop for better ergonomics but I wanted to be able to still use it as a tablet (possibly while standing). There are several VESA mount options for laptops, but none seemed to suit my needs. I decided to build this out of Plexiglas and several screws with nuts and washers. Here's what you'll need to build this
An X-series tablet (The measurements may vary, I have the X61t).
A drill with appropriate bit.
Some measuring utensils.
And some consumables:
1 sheet of Plexi that is 12" x 10 3/4" x 1/4"
2 sheets of Plexi that are 2" x 10 3/4"
4 5/32 1" metal screws
7 5/32 2" metal screws
22 5/32 washers
11 5/32 nuts
The Plexi and fasteners cost me about $20. I even had the Plexi cut (if you live in/near NYC go to Canal Plastics like I did. It's a great resource).
Step 1: Measure/drill holes in the large piece of Plexi
You will need to put three holes at the top as well. On my laptop there is a GSM modem antenna which makes the top uneven. I chose to put the three top screws off to the side so that it would not interfere or put any load on the antenna. YMMV depending on your laptop.
I also used the laptop itself to determine the placement of the holes. This was easy and helped me to make sure that the laptop would fit in the final product.