I've been trying to find an inexpensive way to add a SFB to my GOSM so I can use an AMNPS. I found a metal toolbox I could add easily but am wondering if it would be big enough. It is 16"X7"X7.5". Do you think this would be big enough for an AMNPS? The CharGriller SFB is $60 and I can get this toolbox for $14. It has a hinged lid and metal handle so I could make it so it could be detachable. I would just have to cut a hole in each end and add a baffle to one hole and add a rack to elevate the AMNPS a little. Does this sound feasible?