I have been researching different router table plans and have come across numerous designs (including the NYWS) which use 1 piece of 1/2" thick MDF and 1 piece of 3/4" thick MDF. My question is why not use two 3/4" thick pieces? I have the 3/4" MDF already and it would require the purchase of a 1/2" sheet. I would figure that thicker would be better, but just wanted others' opinions...