Hi guys I'm looking at building my own gas forge and I'm planning on using a small sized helium tank as my forge body. Seeing that I only need an opening of 7-8inches wide and 5inches tall (aprox) I'm wondering what I can use as a filler between the sides of the tank and the ceramic blanket I plan on buying. It would be too expensive to go ceramic blanket the entire way so I'm wondering what, if anything would be a good material to use to build up the sides to my desired size. Would a plaster of paris & sand mixture be acceptable? Any imput is really appreciated! Thanks
