Be careful in your SS choice..
As Paul reflects, it my lead to other things you aren't prepared for. I work in the heavy jet industry and shot many a SS rivet, actually the Monel being the best choice, however, it can lead to disaster if you have a short edge margin, or need to drill one back out. I have yet to read a factual report about a burn through issue worth worrying about to that level...just stay per plans and move in is what I would suggest.
8A7 / Advance NC