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Eye gauge you say(lol). Thats what majority of these local engineers keep doing.. Even when it comes to machining on a lathe. They do eye gauge as well.. And when you ask them they will tell you they aren't new in the game meaning thats not the first time they are doing things like that without precision or the ideal steps which is prone to error in a short while most often ..
Thanks for this eye opening bole hole drilling system. Great job

Yup! So bad of the quack engineers.