I picked up this reverse flow project and have been checking out alot of the threads on this forum and wow there is alot of info. First a little about the pit. Its CC measures 24"Wx60"Lx28"H the FB measures 24x24x24 and i measured the hole going from the FB to CC and its 2 3/4"x16" also measured where the RP comes to the other end of the CC and there is 4" gap. Also it has 3 - 4" intake dampers and a 3" exhaust. Wow i think i covered most of the specs also FB is 1/4 steel and most of the cooker is 3/16 steel. Alright now on to my questions first i have been using Feldons calculator and from what i can tell the fire box is of proper size. What im not sure about is the opening in the FB going into the CC if its the right size. Im also not sure about the RP if its to far from the end or should be closer right now its 4" from the end. The next question is how high should your food grate be from the RP and should the exhaust be placed closer to the grate area or come out the top. Currently it comes out the top but i thought about making it come out right above the FB and make a 90 and go up. Any input and ideas will be awesome i got this thing for a good price and can fab anything. Thanks for all the future help and look forward to hanging out here.