Here's a link to his setup: Here
So I built something similar to what he has. I used 1 1/2in door hinges and 1 1/2 in by 1/8 in thick steel for the actual spreader. I cut the pieces of steel at 10in length. After some cutting, drilling, cussing, figuring stuff out, and with help from my dad I have a new tripod spreader.
It works great and looks decent as well. Th next thing I'll do is add a wooden eyepiece tray to the spreader and bolts instead of screws where the hinges connect into the tripod.