I just got my Field Link too.. I'm so happy that Castle came out with this product. It really helps me with ESC setting on the fly.
I'm wondering if Castle can fix a minor bug in the Field Link, whereby, when I'm setting Motor Type to Brushless, and then I single-click from from Motor Type to Motor Timing, the Motor Type setting (that I had just set) automatically goes to the next available setting (eg. from Brushless to Brushed Reversing).
Hope Castle will include Field Link firmware update into the Castle Link software.
Not a serious bug. I still like the Field Link very much. Thanks Castle