I’m jealous of your Lewis Horn Mr. Cooper. 📯I have a Geyer with a Lewis pipe which very cool, but is quite old, and I certainly cannot use #11 on it! Cheers!
I like to put a little graze of oil on the threads of all my caps to make sure they don't seize, not even a drop but just some on your fingers and then rub it on, then tighten it with a "torque setting" of as tight as you can make it only putting one finger on the cap. Also, I like to put a drop in the lead pipe to have a nice thin layer protecting the brass from corrosion, but it should be done prior to cleaning the main slide so that you can get the oil off the slide and make sure it's nice and greasy rather than oily.
All good stuff thanks but what about pulling the mouth pipe through to keep it clean.? Something many players neglect to do so results in sluggish valves from all the detritus that gets blown further into the corpus.
I watched this a couple of times, I made that common mistake dropping on rotor from the valve slide and horn become like under station, slow so I had to wash everything and start all over...
personally i prefer to just drench myself in oil, like olive, and then it just gets to all the places on the horn it needs to go. Salad dressing works in a pinch.
