Can anyone tell me what type of wood is the best for the bed? In the instructions it looks like hardboard, is this affected by the hotbed ? I thought of using Plywood but due to it being a laminate would this bow when the hot bed is on ? I then thought of a plastic sheet but i am trying to replace a printer that is plastic as this causes all sorts of problems. I would also like to use bed auto levelling so will an inductive probe see wood? I am going to use a RADDS control as its the only control i have used that i have found to be reliable.