At first I thought this said 9x, and I'm thinking well duh, it's a $60 radio, you need to mod it. Then I was thinking the 9XR when I saw the trainer switch mentioned. But a DX9? Would not have expected that. Can you do pictures or video of what you mean?
What i mean when i said that the sticks twist, is that if you tighten the stick length screw to much, the ENTIRE stick twists, and it doesn't feel like it's supposed to. It might be a safety feature so you don't tighten the sticks too much..
I'm all thumbs too... If the radio works, great. My spectrum radio sticks twist too. You should be able to set a sound to the center position of your knobs and I don't know what to say about the trainer switch... Is it too far forward or just in the way of other switches? Let me think on the the switch thing...
Oh, the momentary button up on the left shoulder was what I meant. the "A" switch is good as a trainer switch if you have the over-ride enabled, since then you don't have to switch it back to get control.