I am building a stage in my FROG that I am turning into a dedicated HT. I went to local hardware store explaining what I wanted to do and that I needed to buy sheets of MDF for the flooring. They told me that I was crazy and that I should use particle board instead and save the money. The guy told me that it was the exact same stuff just cheaper. I want to do this right and thinking he may be leading me in the wrong direction on this. Can someone give me some advice on whether MDF and particle board should be used for this?