Hi Dan, I’m not sure if there are any plans out there to make a wax
injector, but you can purchase the hand pump type for under a hundred
bucks, and it’s not a bad product. As for burs, each type typically
works for different types of applications, so it will depend on what
you wish to accomplish. I’ve noticed Robert Wooding is on the list
now, perhaps he can recommend one of his books that covers bur
applications in settings.
Precious Metal Arts