I used one several yrs .still have all of it xcpt controler and the 35 watt radio...........which is available if needed. I initially used a sokkia sdr 33 controller......had many problems .......got some support from ashtech but they grew weary and told me taht if I would get a tds ranger they would support me........... i did an basically did not need much support after that. It was a great system for me.....once considered selling or switching, and someone asked me why...........said it was the only system some folds in tokyo bay would use...........Need some more components? tedharp@aol.com