Centrifugal vs Vaccuum -- why choose?

Jewelry Discussion
1

Here’s an idea: Why not do centrifugal casting under vaccuum?
<<<nudge, nudge, wink, wink>>>

Hmmm… This started as a joke but I bet John Burgess could
make it work.

Tom LaRussa

2 
            Here's an idea:  Why not do centrifugal casting
under vaccuum?         <<<nudge, nudge, wink, wink>>> Hmmm... 
This started as a joke but I bet John Burgess could  make it
work.

G’day; probably: but it wouldn’t half cost a packet in $$$ and
time. Be cheaper to buy one at around $20,000+ How would you
heat your metal other than by induction or microwave, for a
start? Cheers,

        /\
       / /    John Burgess, 
      / /
     / //\    @John_Burgess2
    / / \ \
   / (___) \
  (_________)
3

Centivac…(my name) Galoni has such a machine complete w/argon
atmosphere. Cough up $30,000. J.A.