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11 Now that we’ve spent all this time talking about keeping things “old-school” with a string, we will make a concession to modern technology. Wallace doesn’t actually string his cars with a string any more. Instead, he uses an inexpensive laser like this he picked up in a hardware store and a cheap camera tripod like you can see here. However, it’s imperative for the laser to be completely level front to rear, and especially side to side or the measurements will be off.