i have been searching this forum for info on an easy to build propane/mapp gas small forge. while reading the different posts they keep referring to the "stickies" at the top. i have looked but can't find what they are talking about,please help. also what does "air hardening steel" mean? does it mean that it does not have to be quenched to harden? last question. while reading about the forges it says to use a soft type firebrick. i have many hard fire bricks. can i use them to build a small forge? will they work as wellas the soft?