My only concerns with your table design are 1) weight... all that chipboard will be friggin heavy to haul into and out of an event location; and 2) durability... I hope you're planning a hard lacquer finish of some kind that can take some abuse, because the chipboard won't stand up to regular dis/assembly for events, especially with your slot assembly design.
The layout is nice, but with such a huge open space, I wonder what your plan is for it? Seems at the very least an injudicious use of such a large table. It's a great combination of turns, but with a few more, you could compact it down a lot more, and get the same circuit length in a much smaller area, thereby reducing table size, and all the weight that goes with it.
Since your table is modular, wouldn't you want to only bring the least amount needed to make any particular layout?