Wow. Thank you for bringing this to my attention. I have never heard of this method, but sounds great.

I replaced an inner tie rod end on my MR2 last weekend and thought I kept the alignment as it was set, but it seems too twitchy, so I think I don't have enough toe-in. I will use your method to check it out.

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1983 300SD "Guderian"
1987 MR2
2015 Camry
2015 Chevy Spark
2006 Hyundai Tucson