I am in the process of building my stand for my new 125g and would like some opinions from other DIY'ers out there. Do you think it is necessary to use plywood (or other type of wood) on the top of the stand where the tank sits. The frame of my stand is made out of 2x4's and I was planning to just sit the tank on the 2x4's. But, in looking at some of the other stand on here, it seems that most people prefer to top the stand with a sheet of plywood or something similar. To me it seems that all of the weight of the tank would be on the trim, which would be supported by the frame of the stand, which would lead me to believe that the plywood is not necessary. But, I have been known to be wrong before. I am open to any opinions. Also, the tank will be drilled on the bottom and 2 canister filters will be plumbed through the holes. So, if I did add a sheet of plywood I would have to trim around the holes, which is not a big deal.