The final piece to my homemade treadmill desk arrived from Amazon today. This is the end result:
The laptop holder is a Surf Shelf I bought from Amazon. Because the packaging was damaged, I got mine for $35. With the materials to build the keyboard shelf, the whole thing (NOT counting the treadmill) cost me under $60 to set up, along with a little elbow grease and perserverence.
I like the laptop holder a lot, because it holds the screen in a position where I can walk upright and look ahead, instead of having the laptop on the shelf below–that didn’t work for me.
Now all I have to do is figure out how to type and walk.