I have a bunch of receivers that I'll never use. I'd like to swap them for Spektrum compatible like Orange or Lemon. I have no transmitter to test them with but the Futaba and Tactic look almost new. They came in large box with other stuff from the wife of a flyer who passed last year. Doesn't have to be a one to one swap if your receiver has a higher value than one (or more) of these.