The torsion box idea is a good one but I'm afraid a little over my skill and equipment level at the moment. I don't have or have yet to build a cross cut sled and am still using the pitiful miter gage that came with the saw.:BangHead: Remember I'm still aspiring to be a novice. I still have lots of work to do on my measure once and cut twice mentality. But alas I am trying...
Making any table perfectly flat and level will be a challenge since the floor in my shop has a good many dips, low and high spots. So all I'm really after is a good sized table that is mostly flat and level. The table I have planned has 3 stretchers to span the 4' top.
My plan is to screw the 2 sheets of MDF together in case I need to replace one and use contact cement at stragetically placed intervals to attach the hardboard so I can remove and replace it.
The real reason I'm building this table now instead of more needed shop jugs like a cross cut sled, table saw extension table, band saw extension table or supports, and what ever else I need and just don't know it yet is because I bought a pocket hole jig and wanted to use it...:gar-La;
I think I'll try it as designed and if it doesn't work like I had hoped its only wood and I can get more. Thanks for the tips and Bas that is a cool site that I saved in my growing book mark list.