Vaughn:
That looks great on the TS3650, but I don't know if it will work on the right side of the SawStop PCS. The crank to set the saw blade angle would be between the cabinet and the router lift, and that angled support might interfere with access to the crank. Would have to look at it when the saw is assembled.
On my TS3650, I have a Bench Dog cast iron router table extension bolted to the saw table and the rails, in place of the left extension wing that came with the saw. The Bench Dog is 4" longer than the original wing, and with the router and lift is a good bit heavier, but it has stayed dead flat with the table with no additional support and no measurable flexing of the rails.
Tony