Colleagues,



What is the consensus on the use, or addition of NPTH tooling

holes to designs for routing in order to hold +/- 0.005" tolerance.

Just had a discussion with a new customer who said that he has

never had tooling holes added to his designs and has had no

tolerance issues with past vendors.



So, what is it, are we in the dark ages here?  Please tell me what

you do.



Regards

John Parsons



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