Dang. I'm glad I got the MM2-Pro so I can avoid all this nonsense.
There's nothing on the MM pages that stated this difference or I would've simply paid to go with the pro version.
For the record, I stuck with the MM2 standard version since it was already an upgrade to my worn out Barley Crusher which I'd happily used for three years, though only 70 batches or so which is too little for it to wear out IMO. The MM2's rollers are 1" longer and .25" larger in diameter and the hopper holds 4 more pounds of grain. I was getting a very consistent 81% efficiency with my BC so I felt no need to try to improve in that regard and the standard rollers are rated for something like a minimum of 15,000lb's of grain milling before wearing. I got about 700lbs out of my BC. So I was content with the standard when ordering.
Rev.