If I could give this company 0 stars I would. They...

If I could give this company 0 stars I would. They use threat tactics from attorneys to force existing customers, like myself, to sign a contract. Then put your account on hold and refuse to sell parts until it is signed. This is an illegal practice, unethical and absolutely poor customer service.
The picture shows the poor quality of the hand pieces that break every 9-12 months. Find another manufacturer if you're looking to offer this type of service.