Ron wrote: "I use 1/4" for the first pass, and 6.8mm for the second for 2/0 pins." Ron, When I double drill, since accuracy is the point, it's hard to center the second pass on the first hole unless I switch bits before moving on to the next hole...a real pain. I assume you don't change bits for each hole, right? If you come back to all the 1/4" holes for the second pass,how do you spot the center. Jim I
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