Welcome to Monday.  I had a very busy weekend with a birthday party for the Kid, family in town etc... Not much time was left over for my project.  However I was able to nip out to Home Depot for the raw materials for the desk and supports. 
First up are the front supports.  As I lamented earlier, there is an extreme dearth of 3x3 inch posts in the world.  So I ended up purchasing a 1x1-1/5"  board that when I screw/glue it together will be close enough.  Of course I had to have it cut down into 13" chunks.  
For the rear supports (which need a hole cut out of the middle) I went with 5" wide Trex (aka plastic) deck boards.  I'll screw/glue two of those together to make a good support.  
The desktop is a 35x38 sheet of smooth composite board.  I will prime and paint it black along with both sets of supports to match the trim on the treadmill.  
I have deck screws and a set of hinges (so I can lift the top if needed) to bring it all together.  
I'll start assembly this evening. 
THE SUPPLIES 
