Here is the trick. the Tamiya manual says to press the setup button and then you have to move the left and right sticks in a full sweep up/down and left/right, then press the setup button again and you're done. To get the DX5E to work correctly you will only move the sticks about 50-60% of the full travel during setup. Once completed you should only have to move the throttle trim down to get the tank in gear. For the main gun and machine gun all you need to do is move the stick fully up or down quickly and they should work fine.
I worked on this for 2 days before I got it to work, so I thought I'd share it here and hoefully save someone else the trouble.
