Greetings,
I've been using the neat jig Tony Karol described for making bridges and drilling bridge pin holes for about a year now. It's a great design. I can't find the post where he describes it but maybe someone else has it. Here's a little mod to make lining up the starting points for drilling the pin holes easier. First rout the saddle slot (mine are 3") and mark the centerline of the slot.
The mod is two pieces.
1. A surrogate saddle with a centerline mark
2. A spacer to mark the set-back from the saddle slot with marks for the starting point for holes 1 and 6 for a given string spacing. A nice feature of his design is that the bridge pin holes parallel the saddle slot and this helps you be sure they are parallel. I use a distance of 0.3" from the back of the saddle to the center of the bridge pin holes so the spacer is 0.3" wide. The bottom of the spacer has the same radius as the top of the bridge.
Put the saddle in the slot
Line up the spacer with the centerline and clamp to the saddle
Draw a reference line along the edge of the spacer and mark the starting points for holes 1 and 6. Transfer to the Karol pin hole drilling jig and line up starting point 1 and off you go. Marking the last hole allows you to verify your drill press jig is set up right.
Terry
..... BRILLIANT ![[clap]](./images/smilies/smiley32.gif "adulations")
. Will be making one of those maybe tomorrow !!!!