Unless you can tap them and use a set screw...

 

Wow, so many ideas. I'll have to wait until I actually have the locks in my hands to see how I want to approach it. If there is enough extra material on the lock shafts I could use a tap to thread the shafts also.

 

In my original idea, I didn't think of possibly having to remove the door panel. Doh! Obviously the epoxy would be a bad idea.

In rethinking... If you don't really use the door lock, what about my original idea, but just use a dab of silicone instead of epoxy? That would keep the skull head on, but would be easy to pop off if you need to remove the door panel.

 

I think cutting/gluing is a bad idea in general for tihs application. I could forsee the top coming off when bumped by your arm, or if pulled too briskly. Not to mention the unsightlyness of the glue/seam.

My method of drilling the knob shaft oversize and using silicone to affix it leaves everything looking perfect on the outside - and retains the structural integrity of the knob and head.

 

[QUOTE=SoCalHHR]I think cutting/gluing is a bad idea in general for tihs application. I could forsee the top coming off when bumped by your arm, or if pulled too briskly. Not to mention the unsightlyness of the glue/seam.

The seam would be behind the door panal, invisible unless the door is taken apart. It would just connect the stock rod with a standard threaded rod-one that accepts any door knob. For the skull to line up, one could always use a small lock nut at the bottom to adjust the height.