I recently finished a large window (approximately 6' tall by 30" wide) and I used copper strips along each side, then across the panel where I could fit it into the pattern. It seems to be "ok" so far. I have it mounted in an oak frame and that is screwed in place inside of the existing window frame against four lath strips. The soldering is a little tricky since the copper strips are higher than the glass surface, but it puts more solder along those lines in the panel. Since the stained glass window is inside the home and not exposed to any outside weather, I think it will be fine. I also don't live in an earthquake area; if I did I would most likely have used some reinforcing rods as well.

Very nice. Now if there is a cigar version...?