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Hi guys - nice to hear from you Joe - glad you are enjoying the journey That's a very nice little lubricator you have there Derek - I have wondered whether to go to something similar and try to make one but it's yet one more thing to make and time is pressing.Unlike yourself and George I don't have a great deal of experience in running engines on steam other than my old Twin Victoria set up. That ran at shows (about three per year) for something like twelve years without a lubricator. I would just inject a good slug of steam oil in the manifold (where a lubricator was intended to go) and let it run. I found I would need to do that about three times throughout the day. Not ideal perhaps but it did work. The first time I ran it on steam I just cleaned it down and left it only to find it the next time some months later that it was very stiff to turn over. Stripped down revealed rusty cylinders to blame but they cleaned up well enough. This had bronze pistons - I can't remember whether it had PTFE or graphite yarn packing. From that point on once home at the end of the day the engine would be run on air with more injected steam oil to displace any condensate and hopefully coat the internals. Again maybe not ideal but it did work as the problem never occurred again. Finally, after about ten years I gave up running on steam as it demanded too much attention throughout the day - running it on air was much more relaxing and allowed more time to enjoy what else was going on. I would still inject a slug of steam oil and still to this day do the same with the Waller and Double Diagonal - never ever had any cylinder problems with those either - again cast iron cylinders with bronze pistons but with PTFE packing.The Double 10 of course will get a good working so lubrication is obviously going to have to be more controlled - I confess my interest in running it on an ongoing basis doesn't have the appeal it once did and if that continues it may not see much (regular) water time but I agree it's a detail that does require proper consideration.As always thanks for your interest - I do appreciate this kind of observation and input from both of you I'm off out now to show the engine to my good friend Gordon who's unable to get over here these days as well as a chance to visit my old works which is close by - even more . Kind regards - Ramon