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Been my experiences that brand new does not mean sharp or correct angle on bits or blades. The manufacturer generally provides a OSFA grind that tends to survive the punishment a newbie does but does not do all things really well.
Drilling plastic means a duller bit since you want a melting action to prevent stress cracks around the hole
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casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
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