I back bored the holes where the studs will be welded to allow for good penetration. I just need to get more bolts to build a "jig" by bolting the two plates together to set the stud depth uniformly. In the top plate in the photo the second and third bolts on the top row are two of the the actual stainless studs to be welded.Now halfway there. I need to pull the remaining studs from the aluminum and drill the stainless beneath and then fit and weld the new stainless studs into the plate.
So far so good!