As an alternative to maple get a sheet of 5/8 or thicker MDF, use 3 thicknesses of it separated by Blutak or generic equivalent at corners and held together by brass screws at corners and in center. Home Depot will cut it to size. I have done this for turntable stands. This is courtesy of Noel Noland at Skylan Stands. He maintains that it is better than maple, from my experience it is competitive with them but by the time I have taken my table apart and switched them and put the table back together it is impossible to make a reasoned judgement. The whole thing should rest on brass cones, tape washers or coins to bottom of stand for points to rest against or get threaded cones and drill stand to accept them. MUCH cheaper than maple, if you want to use maple try MICHIGAN MAPLE BLOCK or other supplier of cutting boards, I got a very good one from them.