Hey guys, new to the site, and the craft. Been lurking in the forums picking up info. Firstly I want to say thank you for sharing your experience with us noobs. To get to the point, I’m building my first proper forge, using standard process as explained in these forums.... However I’m a tinkerer, so I tried using flexible graphite foil in place of Castable, for the top half anyway. Applied kiln wash the same on both surfaces. So far so good, gets a good yellow glow inside. Noticed after turning it off the graphite side seemed to be radiating more heat than the bottom. Any thoughts or something I’m overlooking?