Lower Shelf Assembly

For the lower shelf of the hourglass table, solid wood is not an option. The shelf is bound on all 4 sides by the table legs, and the inevitable expansion and contraction of a solid wood shelf would break the table apart. therefore, I need a piece of 1/2" walnut ply.

I went to my local dealer and of course all they had was 1/4 and 3/4. so i bought 2 pieces of 1/4 and am laminating them to an MDF core. I have never done this before but hear it works well. I'll update if there is any problem.