I've been using fully adjust monitor arms for a number of years, but they are heavy, and I realized that I never actually adjust them. I decided replace them with something fixed, and this was the solution that I came up with.
The total cost for these monitor arms was about $40, including the glue and all of the screws needed to mount them.
Step 1: Parts
The base of the mount is made of two parts. A flange, and an adapter. The flange is actually for a 3" or 4 " pipe (there were no 2" flanges available), and the adapter goes from 3" to 2".
I also bought some slip connectors so that I could cover the hole from the top, and create a stronger mount. This isn't entirely necessary, and could be left out, especially for smaller monitors.