P.S. If you have sub trim on your radio, use it to center your steering before setting endpoints/travel/whatever your radio calls it. Then use regular trim for ongoing fine tuning after setting endpoints.

Reason is sub trim moves endpoints, regular trim does not. Same applies to other channels, throttle etc.

Never hurts to recheck endpoints occasionally either, in case anything wears/deflects/etc. Its easy enough to do.

Bonus points for driving slow circles each way, check for equal turning radius in each direction.