So after two and a half tanks, still no leaking. I am fairly positive the culprit was chimney oring. After trying everything else. Go figure. If anyones has a lemo that leaks, you might as well change oring first and tighten down as much as posible the positive screw. Check for cracks in glass and if none found and still leaks, it's very probably the build. Thanks a lot to all who helped.
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