Last night I changed out my steering servo in my Blitz and I did something wrong because even with my trim turned all the way to the right the truck goes slightly left in the 'neutral' steering position. How do you center (is this the correct terminology?) the new servo to make sure you have equal throw to both sides? Thanks in advance.

With it hooked up like you've got it, take servo horn (arm) off. Hook battery up and turn it on - that will center the servo, you should see it center itself. Now carefully replace the horn without moving the servo off center. Place the horn on servo with wheels as centered as you can get them.

Now trim as needed.

Set your trim back to the middle before adjusting the horn.

It's a common mistake. People assume a new servo is automatically in the center position of its throw when it comes out of the box. They aren't. That's why you should always center your radio trims then plug in the new servo to center it before installing.