Well, I finally have the parts to proceed to the breadboard stage; waveform generators (both low and high speed), phase/gain detectors and breakout boards to match. I'll be soldering them up this weekend and start working towards having the low speed waveform generator and gain phase detector on a breadboard talking to an Arduino (at this stage I'm after easy to work with; speed, features, form factor and power usage will come when I proceed to prototype).