I recently started this massive Google Sheet. It includes all info about Bafang Mxxx motors: Bearings, Gears, Standards, Threads... I'm trying to cover every detail possible. Please contact me or reply, if you got something to contribute and your source for it. I want only facts and clear myths. 
Google Sheets - Bafang Mxxx Mid-Drive Overview (Read-Only)
Google Sheets - Bafang Mxxx Mid-Drive Overview (Read-Only)
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