I’ve laminated the 1/4" mahogany ply to 3/4" baltic birch ply to form the main body of the two desktops. I used standard wood glue and a ton of clamps. The glue should be fully cured by tomorrow and then I will cut them to final size and begin to make the solid mahogany front and rear edges for the top and cut the tops for the solid mahogany breadboard ends.
The final thickness of the laminated top is only about 7/8 of an inch. I was shooting for a full 1", but of course the finished thicknesses of the birch and mahogany plys are thinner than their full 1/4" and 3/4" dimensions due to the nature of manufactured ply now-a-days (finish sanding at the factory reduces the thickness). So, I think that my original design thickness of the breadboard ends (1 and 1/8") needs to be reduced to only 1." I only want the breadboard ends to be about 1/8" proud of the rest of the top. I will re-plane the breadboard ends to remove another 1/8".