I suspect I know the answer to this question, but I am going to ask anyway. I have just finished a complete strip, clean and replacing washers/seals etc on my first Tilley Lamp. Everything was disassembled, cleaned in an UltraSonic Cleaner, blown through with my compressor - I think I did a good job on all that side of things. I tried the Blue Flame Test, and all looked really good - nice even (but quite small) blue bunson flame all around the ring. Then I put a mantle on it and tried it. Yuk!! The light output is quite poor (100 pumps) - I notice the mantle glows really bright white - as expected - right near the top, but patchy and not so bright all around the lower sections, I have tried to capture the appearance on some photos, but to be honest, I don't think the photos show the appearance very well - they look substantially better than in real life. These are not original Tilley mantles - they are cheap ones of CrapBay - I thought I might try them until I've got a better idea about what I am doing with these lamps. So - thoughts on why its misbehaving? Crappy mantles?? I figure after a good Blue Flame Test - that's about all it could be, and of course the old adage - "You get what you pay for?" Just another quick one..... Is it safe to pump these things up as much as it takes to raise the pressure indicator pip? Do the pips ever get stuck and fail to lift?