Step 3: Build the Jig Body

The jig body is fairly straight forward and easy to make.  The goal is to end up with a U shape that has a sturdy length that serves as a backstop and two arms for attaching your dowel and flip stops (see next step).  A set of runners holds the jig in place on the drill press.

Notes for the backstop:
-Make sure your back stop is square!  Use a jointer and planer if it isn't. 
-Make sure your back stop isn't too high - it may stop the drill from being able to fully lower.  Mine was originally an inch or so too tall, so I ripped it on the table saw to cut it down to a better size.

Notes for the arms:
-I used a piece of scrap to test out several drill bits until I found one that made holes that fit my dowel snugly.  Then I drilled two holes in each arm (this will allow for raising the dowel to a higher height to accommodate odd shaped cribbage boards.
-I attached the arms to the backstop with wood screws, pre-drilling the holes on the drill press to prevent splitting.
-Make sure they're square!

Notes on the runners:
-Two runners attached to the jig to fit in the grooves on the drill press will allow you to slide the jig back and forth.  This is one area where I sort of free-styled it, and maybe could have found a better technique.  I cut the runners to size and screwed them in one at a time (again, pre-drilling holes to prevent splitting) but had trouble getting the second one in the right place.  I got frustrated trying to get the second runner in the exact right position and eventually just sanded off a few millimeters with a belt sander until it fit in the groove.  The jig isn't a perfect fit in the base, but it's pretty good.
<p>Ha. Re-reading this years later. I spent 8 hours on the jig and made two boards. Then I broke the jig moving to a new apartment. Definitely could have just carefully drilled 300 or so holes in less than 8 hours. Classic time-saving work-around that took longer than the time I saved!</p>
Yes indeed, this is a nice instructable! And a beautiful board too.
What a cool idea! This is a great way to get other kinds of hole patterns too!

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