Hi DarkMarc86,
The constant you have defined for the queues at the Obtain Queue.vi is a 1D array of Waveform data. Change this to a 2D array of Waveform data and you should be able to use the queues how you want.
Below is an example of synchronization as well. It uses a master/slave architecture to achieve synchronization.
https://decibel.ni.com/content/docs/DOC-26326
Hope this helps