Yes, this does sound pretty cool. There was an article in QEX a while back describing a homemade network analyzer but it used expensive lab grade components (directional couplers, video detectors, etc). I thought it was very clever of these folks to use tuners as signal sources. With the prices of used analog scopes these days, this kit puts many hams within the reach of a very useful piece of test equipment.
Mark K5LXP
Albuquerque, NM
k5lxp@arrl.net