I picked this up last week, and dont see alot of info on the web about this. Its pretty clean need a good wipe down and insert from fine tune knob is missing guess I can fab something in there. My question is are these any good? takes some time to tune but works, I use a mfj-986 tuner which I am happy with but saw this and the small size of the unit got me thinking of using it in a mobile application.