Working on my first Bison and had to order repro horns as the originals flaked very badly. I'm wondering what the best way to secure them to the form is though. The repro horn bases are the same diameter as where they meet up to the form so they will not slide over it as I envisioned. In fact they have quite a lip at the base that would prevent that anway. The only thing that comes to mind is putting lag screws into the form before fillling the horns with bondo and placing onto the form. Is there a better way?