Oven/smoker mod question

Thanks ron.
I looked on the Gorilla Glue site and checked out their paints but didn't see anywhere that said if it was safe to use in something that was heated.
I only have the small holes (mostly) to fill in so if it is safe and good to go that would be great. Going to stop by Lowes tomorrow , Home Depot if I have to, and see if they can help. Just hate when you ask them a question and end up knowing more than they do about the subject, even if not much.
Didn't know there was such a thing as welding in tube type of material. Long as it has good heat resistance (assume it does) then that would work great!
Crossing my fingers.

Thanks for all the suggestions guys. Think for the most part I will just add washers if possible, cut a piece of metal if a washer wouldn't work.
Here are 2 pics of where I am at so far.
First one I took last night, it is a little blurry but unlike the other you can make out the vent stacks. The other I just took a few minutes ago when the sun was out and you can see the few little holes I have to seal. Also this particular oven had a side broiler and not one underneath, so I am using the smaller side broiler and the oven side as 2 separate smokers, that way I can not only smoke more things at once, but 2 completely different woods, and am wondering if I will be able to add a removable vent to combine the two on top for a third smoke, or if it cools enough by then hopefully a removable cold smoke box.




Biggest thing left, I think, will be cutting outt he bottom so I can add the hot plates.
Thanks for looking, and thanks for the helpful comments everyone.
Oh, and yes there still is one element in the smaller side, I just haven't removed it yet.