I just let Dynotech make mine.. they have done 6
of them for my own junk... most cases a item that
spins goes through a "Order" frequency and in most
cases its a X factor.. I've watched a ton of stuff
on a strobe light to get the frequency .. then when
you double it, it comes back in again... like a set
of tires.. they may be out of balance at 60mph and
again at 120mph