Here's my polk update. $207 and shipped quick. I dropped on the floor in the first 4 minutes of ownership ,on way to charger. No breakage. This will not do heli's . Manual a little hard to understand. Charged for 24 hours and did a test. It already saved me $12 on a new crystal. I had a plane I traded for with an expert RX ch 26 in it. Was going to buy a Hitec crystal to try on my airtronics RD6000 which will do the - shift. But I just fired up the Tracker III changed to ch 26 and - shift and worked great . I now can fly any receiver and channel I want. The polk receiver has a full 8 channel slots plus bat and channel switch slot. Worked great. At $70 and no crystal to buy why should I buy a universal Hitec and crystal for $65 and be locked in on one channel. Like Lewis Polk said ( This ain't no $2500 radio) It is meant for 95% of the airplane flyers out there.