I want to turn my Heavy Older New Braunfels SFB into a Reverse Flow!!! I think it can be done pretty easy but I need a little advice on 2 measurements: First, I was obviously going to remove the Stack and relocate it to the other end, pretty simple and then I'll plug the hole left behind with a piece of steel and use the bolt holes that are there... NEXT, I need to DROP the SFB down for 2 reasons, I don't want that big of an opening and I don't want the PLATE steel for the reverse flow to be that close to the bottom of the racks.... So, I have 2 questions: How much opening should I leave into the chamber? And, How much room do I leave at the other end with the reverse flow plate? About how many inches should I leave open at the end? Let me sneek one more Q in here.... I used to be certified so I'm not a complete NOOB, but if I were to go out and BUY a welder for little stuff like this, what is the most recommended to work on steel 1/4" and under. I would like to have a wire feed, I think that would be cool!!