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Old 15th Mar 2021, 8:37 pm   #14
The Philpott
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Join Date: Aug 2016
Location: Colchester, Essex, UK.
Posts: 2,807
Default Re: Enlarging an existing hole in a steel chassis.

I think i would be confident enough to do this job with a dremel abrasive stone, going gently and rotating it around the hole at an even speed and even pressure. Certainly easier to get an even round hole than filing.
Dave
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