I have this old kerosene lamp that I've been dressing up, fitted with a 10" regular bulge chimney for a #2 burner. A while back I found a good deal on a 10" green based shade, so I picked it and a tripod shade holder up. The only problem is the bulge is way too large to let the lamp sit down and rest on the tripod holder. I've since tried a slim bulge chimney, and even one of those slimline chimneys, and they give the same results; the shade simply won't touch the shade holder. I don't know what to do about this, if anything. Does anyone know what I can do, or should do?