I uploaded this video yesterday on the jumper t12 - https://youtu.be/0wU6Fa11I8w in it I was completely wrong about Jumper's use onopen TX. The have fixed up the requirements so it fits withing the GPL V2 I also went back and tried it again with a lipo like many people suggested in the comments.
Sorry for yesterdays incorrect info. The old video is unlisted so it is not easily searchable and shouldn't impact people searching for info on the radio.