Although this is a great display for customer education or to illustrate your discussion, you should think twice before having it on the counter. As a technician with a bit of an perfectionist streak (that or OCD), it drives me completely batty that the number of cogs on the cam and crank sprockets do not have the correct 2:1 ratio. Also, I can't find the alignment marks. If you can overlook these shortcomings, this is and absolutely excellent
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