fwiw
Here are the spec's if anyone's contemplating adding a set to their bass.
I
might swap the tuners on my Dano Longhorn if there's enough wood to prevent the headstock from cracking or splitting.
I'll get the advice from a local, qualified luthier before I proceed.
If I
do swap them, I'll post pics and an update.
Hope this helps someone.
9/16 drill bit for the posts
1/16 drill bit for the mounting screw