I am looking to buy a new locator my old one is out of date (wont work in cast) and i lost the sond down a pipe. I was thinking about getting the NaviTrack Scout. Is the NaviTrack II better if so what would i gain? from the Ridgid wes site all that i can tell is it cost 2x more. i also am going to need a remote transmitter and an adapter to attach it to my spartan drain cleaning machine.