quick question, I am getting ready to build a gas forge from an old propane tank. After reading a lot of posts, my thought are to line with minimum of 1" kaowool or equivalent (outer layer) then about 1/4" ITC 100 or equivalent for the inner layer. Fire brick on the bottom for the flat surface (on top of blanket liner) and also coat with refractory. Good idea, bad idea, better ideas?