Hello again,

I recently made a baby teething ring necklace using a silver tube, but I had a lot of trouble getting the tube into a true circle. I'd flattened the circle a bit to solder the two ends together, but I was then stumped how to get rid of the 'bump'. Obviously with a piece of wire, you can just hammer it on a round mandrel, but that's not an option with a hollow tube. What's the trick?

Thanks in advance,

Karen