I am building an office desk that will be 8 feet long. It will have 3 legs. One at each end and one at the center. The end legs are 2 inches thick built-up plywood with a 4 inch extention forming an ell that will be bolted with 1/4 furniture bolts into steel inserts in the top. The center leg is 2 inches thick with 3 inch extensions at each side forming a tee. The connection is the same as the ends. This will provide 2 equal spans of about 38 inches.

I will be using 3/4 MDF for the top. I orginally planned to laminate a perimeter frame about 6 inches wide to make the top 1 1/2 inch thick. The top will be banded with 3/4 x 2 maple. Any thoughts on if the top will stay flat or should I laminate a solid 1 1/2 MDF thick top? Or something else?

Thanks for your help.