I agree the Jumper looks like a great system, far better than the 9x. Sounds like you have nothing to lose. I went with Er9x in my Turnegy 9x Pro, it's also got a steep learning curve, not documented all that well. I'm not sure how much different Er9x is from OpenTx.I bought my 9x less than a year ago and hated it almost from the start - if it works to get OpenTX on it, super, if it bricks it, I still have my Jumper T8SG V2 Pro which is far superior in my view - I've even added the voice option to the Jumper