I'm not attempting to 'diss' your spinner, but I don't understand this line in your advertising:
"THIS IS A PROFESSIONAL GRADE SPINNER, MEANT FOR YEARS OF USE; NOT A "PERSONAL" SPINNER".
My Vertex is also a well made 1/3HP motor spinner. My Vertex is marketed as a 'personal' spinner and not a 'professional grade' spinner, but exactly what makes the 'ATI' better, or 'professional grade'?
My guess is that both models are just fine at spinning balls, and will most likely be just as durable.
Then again, that $50 price looks pretty darned tempting. Let's see how the bidding goes.