CNC cutting finger-joints

[physics]

Some further thoughts: with a router I may have to fiddle with an additional backer board to sandwich both sides of the workpiece to avoid tear-out, so I might have to do a bunch of fiddling with clamps. Table-saw only requires one piece, which can be part of the sled. I don't want to sink time into a sled, but I see that there exist purpose-made box joint jig sleds with the capacity for tall boards like the Incra i-box, which is comparably priced to the dovetail/finger-joint router jigs I've been looking at. So that's another possibility. I'll probably go with the router jig if I can figure out a way to keep the 2nd backing board clamped in place while just moving the jig and it's backing board, or if I end up being wrong about needing the 2nd backing board.