Hustlin' Hank wrote:
.....
Another thing you might try is hair spray. It will make things very
slippery. I use hair spray to install handlebar grips on motorcycles.
Altho I am not sure what would happen if you let it sit long enough to
dry, it may glue them together. Usually takes awhile to dry if you use
a lot. If you try this, let us know if it works. :-)

I don't have any hair spray, but I guess I could get some and try it. My
hunch is that it would get sticky before I could make the adjustment I need
to make in the fittings.