I've got one that I am selling now. It's been sitting in my garage for the past few years. It works well with portables, but won't add anything to most high power trucks. I used to use it on some commercial accts before I had a tm. If you are interested, send me a message. It is in excellent condition. I think I paid $800.00 with shipping. I'll sell it for $150.00+shipping.
Been there done that save your money and spend it on a used floor machine instead to preaggitate, bonnet, encapsulate, strip floors, much better for the money!