With four linear actuators from eBay, I started by sketching the layout in Autodesk Inventor, found some appropriately wide scrap in the yard at the TechShop, and fabricated bracket blanks.
Step 2: Drilling Mounting Pattern
I wanted the brackets to be useful in a variety of ways, so I designed the layout carefully to allow for mounting at a variety of angles. Wrote a bit of G-code and drilled out the patterns on the Tormach CNC mill.
Step 3: Table Frame
Used some leftover 80/20 aluminum extrusion to bolt together a quick table frame, then added the actuators using bolts and t-slot nuts.
Step 4: Wire the Motor Controller
I got a four port controller to go with the legs. It keeps them in sync and prevents the table from getting misaligned or wrenched.
Unfortunately, I didn't check the motor travel of the linear actuators closely when I purchased them and they didn't lift high enough for me to stand comfortably. TechShop to the rescue! I purchased a set of furniture risers and using the mill, drilled holes to match the mounting holes on the bottom of the legs.
Step 6: Risers Attached
Bolted the risers to the legs.
Step 7: Stand and Deliver!
Added a Ikea tabletop and a monitor arm, and, BAM!, I'm ready to start working.
Oh, and in case it wasn't clear, I made it at the TechShop.