Okay, here is what I figured out:
On all my SEs, I noticed there is two bias resistors inline with the steering encoder pot on the car..
Now, if you replace one of those with a small pot, say a 10k turnpot, you can tune the steering to perfect even propo in each direction and then measure the resistance on the pot once you do that.
Then, you measure the ohms on that post and you can get a 1/8 watt or smaller resistor and replace the crappy one they originally put in there with your properly tuned ohm value.
This is the ONLY way you will ever get even propo. I have three different SEs, all with slightly different boards and encoder setups, and this worked on all of them to get the propo even.
They try to hide the resistors under really small shrinkwrap near the board.. The little rubber black things that make it hard to put the pcb back? Those are the bias resistors...
Changing that resistance value is how they get the propo steps on each side, and they do a quick bang up job on it over at the big chinese factory in the sky.. They consider 2/5 as "good". If you want full 4/4 like they are capable of you will have to change these resistors.
Anyway, try it youll like it.
Then, once you get the steering all taken care of good things happen.
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