Table openings

I nearly forgot my economies of scale. I started thinking about pushing on with one of the tables, but held back and got on with keeping them both at the same stage so that all the bit changes and set ups are valid for two jobs instead of one. Table one is resting over yonder with its panel cut to size. The panel planks are taped together ready to have a tongue cut all around the periphery.
On the bench we have table two, the panel planks have been cut to size and the groove cut in the table frame. The little splines fitted between the panel planks need to be cut to length, then this panel will be at the same stage as the other. I used to cut tongue and groove joints, but it means more thinking for the width of the planks and different cuts for each side for no aesthetic bonus, so now I use the splines instead. The plank width is easy to calculate and all cuts are the same. I suppose the point when I changed over to this method was when I bought a thickness planer, which facilitates making the splines, with only a router, I guess tongue and grooves are easier if you have the right bits.