Hey, Tim,
An exemplary job, as usual. Nice work
Personally, I have never seen the advantage of that screw in finial. I have always figured you fill the horn the opposite way you empty the horn - through the tip. But, that's just me. I used to make horns for one of the major distributors and they wanted that threaded finial thing. What a PITA that was. I was kinda glad when they stopped ordering them. I guess that was back in the mid 1980's or so.
John