Bill,
In alphabetical order...
Alpha
Beuf
Camen
Hershman
Recek
Over the years, all have balanced my armatures, on a commercial level.
Many racers to ask me to send new armatures to their choice of balancer, for the initial balance. That is fine with me. I gave up on balancing my own armatures years ago. Have not powered up my balancer in years. Now I simply follow whatever instructions my buyers will give me in regard to who will be their balancer of choice.
Dan Miller