Thank you, Tom! Excellent questions. No, the brass ferrule is custom made and fitted by hand by me. I do a press fit and sealed it with epoxy instead of silver solder, due to the blade finish and price limitations.
And it is secured to the handle using the same method as my full customs, it is threaded into the handle, epoxied, and pinned. It will take either power tools or an awful lot of time to get it out of there. But as usual, the blade will break somewhere else long before it comes out of the handle, if used in any reasonably sane fashion.