I just finished building my own combination sit-stand desk (see giant image below) and followed your Workstation Planner as a general guide for setting the heights of the sitting and standing portions. I'm 6'0" so the sitting desk is set to ~27 inches and the standing portion is at ~44 inches. Now my general plan is to have a desktop running down low and a laptop running up above, but my real question is if any of your products could be used/modified so that a single monitor, through a KVM switch, could be used for both the upper and lower desks (ideally placed near those swivel flanges that are holding up the upper desk).
The only product that looks like it might fit the bill would be the LX Sit-Stand Desk Mount Arm. If you think that will work then great! But if not... I was thinking I could attempt to attach a mounting arm directly to the pipes (OD 1 1/4") and find a solution that way. And although the height of the upper and lower desks are now locked, I am open to adding additional mounting hardware onto the desk to improve things.
The slab of wood that the desk is made of is 1 1/2" in case you're wondering.