Hi,I'm looking for anyone with any knowledge of Lasetec/Filtec Co2 coders. The tube is near EOL and factory wants over $5000 to re-gas it. It apparently uses a glass tube 25-45 watts. Hoping it's possible to replace it with a new tube from Ebay. We haven't opened the head yet,were told by their tech. that tube is dying. It marks PET bottles well at first,then drops to below acceptable after 30 minutes.