I have a lot of old trans. and rec. that were my dads and he has pased on i do not know a lot about then . they are very old 30 years to 10 or 12 years old the newer is a pcm 9 and some jr stuf and alot more! me and my 2 boyes are getting in to flying but i donot know what to do or how to use alot of it is this stuf is it worth trying to use or is it better to get new so i know what i have and how to use it ? We have bought park flyers to get in to it for now. But if we stay with it well move up to bigger and better planes.