Shot my first 300 with an AMF purple angle 11 years ago. Still have that ball but it's only good for super dry back ends with today's conditions. If we don't see much AMF equipment out there, there aren't too many people to recommend it.. creates a snowball effect I'd guess. (fewer people own it, so fewer people see and recommend it, so fewer people own it, so...)
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I was thinking of the immortal words of Socrates who said, "I drank what?"