Regarding Frank's rubber seal problem for chain lubrication do what I do: head for your local home brew shop and purchase some of the rubber bungs. They are available in a variety of diameters and hole sizes. Just cut off the thickness you require. It won't matter if it's not perfect because when you tighten the cable into the lubricator it will then seal perfectly.
This is what I have done for at least 30 years because my lubricator was one I made back in the 1980s. I thought I could buy the seals but also discovered they are not available, so I made my own and they still work when I need to renew them. Thanks for great magazines.
Tony Pearson, member 1329
Good suggestion! The last time I tried to replace the seals the replacements folded themselves up somehow. Frank W