Thanks for all the replies! I have been wanting to build one of these for a while. I really like the way ARS has put theirs together and people have really given them some high marks on the net. I love working with metal, and have never had much luck with making melamine racks, so I decided to give it a go. As far as how much it cost for materials, You will save money making one yourself if you have access to a welder and a reasonably priced supplier. You could save considerably! I plan on selling this one and will make more if the response is good. as far as heat goes I will do the same as ARS and freedom breeder with a piece of sheet metal in the back that is held in place with Velcro. As far as how long it took, I would say 5 or 6 hours. I will make a jig for the next ones and plan I doing the whole single level unit that stacks on each other. The best part is I have had such a blast making it and the kind words here is the icing on the cake! Thanks everyone!