Reviving a "Hackbut" Project

[Cmiertschin]

Newbie here! As the post title implies, I am starting a project for the new year! Recently acquired a 1937-ish King Liberty 2B that someone converted into a sackbut... thankfully it was a very low-cost investment, and upon receiving the horn it doesn't seem to be quite as scary as I thought it might be. The slide is decent considering what I paid for it, and not all that much of the original bell is missing. Here's what I'm looking at to get this horn into good playing shape:
- Slide cleaning and alignment
- Fix and unstick main tuning slide
- General de-denting
- Fix the "hackbut" part of the horn. Not sure which route I'll go just yet, but here are my current options:
- Get the bell converted to screwbell at BAC and purchase 1 (or more) flares from them, preserving original bell tail as much as possible
- Send the bell section to Dave Butler to get a carbon bell put on (with screw rings)
- Replace the bell with another small bell, 2B or otherwise

There should be a couple pictures attached here; let me know if you have any advice or ideas! Since this is a low-cost instrument that would be ruined otherwise, I'd like to get it to playing condition and have a little fun with it (though I do want to preserve original parts as possible).

https://imgur.com/a/gYc6V6B

[officermayo]

I saw that horn and seriously considered snagging it.
Glad to know it found a good home.

[Cmiertschin]

It did! And I'm looking forward to reviving it and hot rodding it a bit as we go. I'll be sure to document progress here as it goes.

[LeTromboniste]

Goodness gracious! Please do revive this instrument as a non-hackbut! Such a shame to mutilate an old trombone like that.

[Finetales]

My vote would be for the screwbell Butler flare.

[Burgerbob]

My vote would be for the screwbell Butler flare.

[Cmiertschin]

Haha, budget-allowing, that’s the dream