| 31. | Next drill pilot holes, at least 10 inches apart, along the outer edge of the casing.
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| 32. | Drill pilot holes, and replace the screws.
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| 33. | Be sure to drill pilot holes first.
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| 34. | Finally drill a pilot hole { inch from each end directly through the top of the casing.
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| 35. | Glue the plug in place; allow time for the glue to set, then drill a pilot hole.
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| 36. | The massive cutters are pulled up as they grind through thick rock, boring along the pilot hole.
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| 37. | The appropriate pilot hole will prevent binding while providing sufficient friction to keep the screw from loosening.
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| 38. | If you use wood screws, drill pilot holes first, then counterbore larger holes to recess the screwheads.
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| 39. | The other hand positions the screw in the pilot hole until the screw bites into the work.
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| 40. | Fill the plug hole with a wooden dowel, drill a pilot hole and drive a new screw.
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