Looking to build a 45" smoker out of above mentioned pipe. Length as brought to me is 60". Attached bellow are rough draft drawings for box will be made from the 15" cut off all plate parts will be cut out of 1/4" steel except top of fire box which will be 1/2" plate. Top of warmer box will be the pipe cut out of the top of the fire box. Scale is 1 box:3". How high should RF plate be and what pitch if any end to end? Fire box I believe may be slightly under sized due to cutting the top of it off to make it flat is there any way to get around this? If I use a bit more wood I'll be alright, just don't want to reload every 45 min is all