Buying a used faceting machine is truly a gamble. There is no way to
know whether the machine is properly aligned - could it have been
dropped or bumped? Even in shipping it can be kncked out lf
The critical bearings that determine the accuracy of the cuts may be
worn and you can’t see that from the outside.
I also had Graves Mark IV and eventually realized that the bearings
were shot and had to be replaced. It wasn’t a bad machine. However,
when I replaced it with a new Ultra Tec I realized how crude it
Someone just starting out in gem faceting has a lot to learn and
usually does not yet have the ability to realize that some of what
is happening might be a problem with the machine. Just as in golf or
any other area that is equipment-dependent, a beginner is the person
who does NOT need to be hampered by defective tools.
Can you facet with a used machine? Sure! But if you can get a
machine that is factory-fresh, you can at least be reasonably sure
that any mistakes are not due to a faulty machine.