I just wanted to mention real quick to anyone that has experience vibration that one of the best parts about this yoyo is the construction really allows you to fix any vibration that might occur if it gets smashed into the ground and vibe is created.
All it takes is removing the bearing and axle and firmly stepping on where the axle goes in with your heel. You will usually hear a click.
I have a prototype Jeff sent me that I have slammed into many surfaces at this point - but I have been able to ‘reset it’ multiple times using this trick!
But obviously - you want them to show up spinning true out of the box ideally - but it can be a quick fix for anyone else!