Awhile back, we featured an article on tube setting, that was a great inspiration for my new work. I started playing with the technique & wanted a way to place the setting in between the band rather than sitting atop it. Here's one way that worked really well for me:
solder your base band & size it as needed. Use hard solder.
Place your tube setting on your soldering block & solder the band onto it. I later sliced the section of ring from the center of the tube section so that it would have clean lines.
finish setting as usual and voila!