I'm getting ready to build one just started buying the supplies. as mine will be out in the open I'm making it look like a piece of furniture. the outside of the incubator will be hardwood 1/4 plywood and the inside will be plastic paneling now the frames going to be 2x2 with insulation in between the two. and your normal flex-watt heating with the cp fan and a 50/50 door glass and wood i just hope it comes out the way i have it in my head