Trust me, it took me a million years to figure out that design! I started off by noting that the saw would stand on it's own (assuming the surface was completely flat), so I thought I'd just bend up some material to support it that would connect to the conduit. I actually forgot about the saw standing up (on it's own) for half a day, and it was still standing when I came back.
Anyways, the main base is 2" wide 1/8" flat bar that has a flange bent up on the back, and I have 5/16" steel rod welded on both sides to act as guides so the saw "drops into place." The rod didn't show up well in the pics though.