Spigot install mistake

I need some moral support and maybe a solution...

I have a keggle but no spigot. I bought a weldless spigot and used a knockout punch to make a hole to install it. The problem is, I made the hole a size too big. Now I'm faced with making it work. I searched around online (mcmaster-carr) and locally for solutions, but am not sure the best way. I'm tempted to just weld the thing on.
The hole I needed was 3/4", but I made a 1" hole. It is a pretty hole, just too big.

Any hints to make this go better?

How did you come to making this error? I guess it doesn't matter.

Well, my answer would be to get a 1/2" stainless coupling and have it welded in. That's the size you'd need anyway.

Get a 1 inch valve. You will empty it faster as well.

I would try mcmaster part 9396K285 and some 3/4 ID 1 1/8 OD washers

might work.