Probably overkill. I usually do 4 small welds around the top, that way the heat doesn't cook the cup portion and you can just grind it off for future service.
Your probably right, I figure, will plan on replacing if ever have to change it again. Car is just a cruiser but our roads around here suck, potholes that swallow 14" tires.lol I idn't want to risk it popping out.