Dynamixel large array in sync (wheel mode)

Hi all,

I am considering using Dynamixel servos (either the XL-320 or the AX-12A) for an installation that requires 100 units to rotate in sync.

I would need them to rotate more than 360 degres, so it would have to be in Wheel mode rather than Joint mode.

Will the units remain in sync, if they all receive the same instructions? Or will they slowly drift, and I need to regularly sync them by using Joint Mode and use Goal Position to move them to the 0 position? Would this be an absolute position for all units or would I need an external sensor and some logic?

Thank you for your help