Daniel, I also bought the Demo Board Kit. Excellent board to relearn all the functions of the VNA. I wish the same people would make one specifically for antennas, Even at scale relearning how to use the VNA can be challenging, and showing the device to others reinforcing the learning curve. This device can fit in a pocket and does not require two men to carry. huge improvement of the devices of the 1970's and 1980's The colour traces make everything so much easier to identify. While the SMA connectors can be fiddly they work fine.
VE6LX