Chems
I'm not sure if you understood my point (apologies if you did). With the saw blade in place, you would not be able to run a long board over the router. The opposite (using the saw) would, as you say, be fine as the router cutter can be dropped and the fence removed.
Are you planning on mounting a Triton circular saw upside down in the table or have I misunderstood? If so, would you not consider just buying a Triton Workcentre rather than attempting to build your own? I have one and found it easy to use, accurate, and best of all can be hung on the wall when I need the space.