I built my dry area table using the design mentioned in "Build Your Own Home Darkroom" by Lista Duren, et al. It was quite a simple task and all I needed were - 3 - 2x4s, 2 - 1x6s, and a 4x8 sheet of particle board, in addition to 4" deck screws and nails. I use it to hold my 35mm enlarger and various dry side "stuff". It is very sturdy and should hold a 4x5 enlarger as well.