Getting to the round stuff.
There are four levels of round - the top and bottom of the drawer case, the apron/drawer fronts, and the top. After gluing up the blanks for the top and upper and lower case (top only shown here because they are all the same process) I cut a piece of scrap ply to fill the void and give me a place to anchor the trammel. The small blocks are temp supports.
I used a 1/2" flush trim bit and made about 7 passes taking about 1/4" at a time. (Yes the top is nearly 1 3/4" thick) Then I adjusted the trammel in about 1/64" and made a single clean up pass all the way round.
The next step was to flip the top over and using a 3/4 straight bit I made four passes around to make the groove for the 1/2" thick by 1 1/2" wide lazy susan to sit in. This will allow the top to 'float' above the drawer case by about 1/16". The lazy susan is very sturdy aluminum and getting one this large guarantees the table to will not rock when leaned on.
Next came the aprons - thanks to Glenn for some pointers on how to cut them. I traced the apron onto a glued up stack of MDF and cut it out on the band saw. A little sanding to make it right and then I attached it to a piece of 1/4" ply.
I marked the apron ends by scribing them against the spokes. I shifted the jig till I got the blade to line up with my cut line and then clamped it in place. All cuts are made at the same setting by flipping the apron end for end. I started the cut about 1/8" off the cut line, test fit, trim, repeat till I had it perfect. Then I used the first apron to mark the other three and made all those cuts.
The end result, it's all coming together nicely.