Hey Emri,
Did you make the funnel? If ya' did and could make more I'd like one. Cost prohibitive? A blued or parked rig would be cool. Maybe you could post instructions on how to make one? I'm handy and love a project.
I use hot water and a little soap, then the usual routine with Hoppe's. I have read a few times lately that Hoppe's alone is good, no hot water. In your opinion is that true?
Death to corrosion,
Lancebear