I used a 1-1/2 x 3" piece. I rolled it up as tight, as I could. There is just the tiniest hole, which is visible in the center.
I pre-oxidized it prior to rolling and hit it with a torch again after rolling it.
- Andy . . . Embrace the day.
Thank you,
I was thinking the same thing put it on a paper clip and roll it as tight as I can, I can really roll tight I've had a lot of practice.