I would like to purchase one of these to use in my MES 30" to use for smoking some fish this winter. All of the reviews I have read say something about leaving the top vents opens to allow for proper oxygen flow. My MES does not have any adjustable vents, just the little hole in the back corner that I use to put my probe in. Will the AMNPS still work for me until I can mod my MES and put some vents on it? Probably only need a couple hours of smoke for the fish I want to do. Help please!