Part 2 String the car:
The QT4 comes with some tapes that stretch side to side in front of, and behind the front wheel. This works good to check the toe, but if it's off it doesn't help to adjust it becasue you don't know what side needs moving. There would be no way to get the wheel straight. So to set the tow I string the car. This is something anyone can do and it's pretty easy, but a little time consuming.
You'll need 4 heavy jackstands or heavy objects, some string, a slide caliper and ruler. Here's how I do it:
First break free any jam nuts and whatever will need to be loose to set toe. Then go on to string the car.
Set the jack stands by the corners of the car just a bit behind the front and rear bumper. Then tie a sting between them and stretch tight. The height of the string should be about center of the wheel to get the widest measuring area.
Pic jack stands used to tension string rear:
Pic jack stands used to tension string front:
Then it needs to be made square. When its all said and done the string should be about an inch from the wheel lip. This isn't a critical measurement, but closer is better to get accurate measurements in the next step. Rather than measuring, I stick out about an 3/4" on the slide caliper and lock it down. Then just use the protruding tip as the guage.
Now we measure. We'll use the rear wheel to get this square. Measure the distance of the sting to the wheel lip at the rear of the wheel and also the front of the wheel with the tip protruding from the caliper. This needs to be EXACTLY the same. Keep moving the jackstands until the front and back wheel lip measure the same to the string. This is why the string should be fairly close to the wheel, so its easier to accurately measure.
Pic rear of wheel with caliper tip protruding:
Pic front of wheel with caliper tip protruding
This seems like it wouldn't be very precise, but even extremely small gaps can be seen.
Pic small gap, not good enough yet:
Keep adjusting until it's perfect. When it is, do the other side. If you haven't put the dog in the house yet, nows a good time
So after all that the strings are now perfectly parallel to the sides of the car. I'll spend the next hour as best I can not to trip over the perfectly adjusted trip lines.