If y’all are interested I got a 40PL ct scanned as well as a 30T for tab comparison. I can navigate to any depth and any angle on each of the cells and take a hd picture from it if anyone is interested in anything in particular. Here is a video of the 40PL to give you an idea for what it’s like.
What would be neat, is to have a 0.2mm nickel strip welded to the terminals, and see the gaps between welded area and adjacent nickel, to see how much of a gap opens up, and at what distance from the weld(s).
I also wonder if the welds would be visible on the inside of the can, perhaps cloudier electrolyte directly adjacent and slightly thinner metal?