If you look carefully at the picture on the left you'll see I laid out some lines and marks and stuff like that there on a hunk of wood.
I'm making a saddle-slot routing jig. I got the plans from Ultimate Guitar Online. There are a lot of good-looking plans there. I was wondering how I was going to accurately rout the slot, and I think I now have the solution.
The plan calls for drilling holes at the end of each slot using a forstner bit. This part is easy. Even I can do it.
In this case, it goes ok. One thing I always forget is that routers tend to jerk when you start them up. They will also easily jump out of line if you let them.
So, let's just say I relearned all of this during this project. Some of my routs aren't perfect. But they are functional.
Then I filed the edges a bit so I couldn't accidentally get cut.
I did the cuts with a metal blade on my jigsaw. Not perfect, but functional.
Underneath there are 1/2 inch wide routed slots to carry the heads of carriage bolts. The bolts come up through the 1/4 inch wide slots you see on the top. I got some cool aluminum knobs from McMaster-Carr to use as adjustment knobs.
This is the bridge side. The two blocks at the front are adjustable to hold a bridge in place.
The two center knobs are adjustable router stops. In practice, I found I could only use one of them - the knobs might be a bit too big. But they're not a critical feature to have.
The aluminum fence is adjustable fore-and-aft to the desired slot angle. The router base runs against the fence to make the slot.
Hopefully this will work well for the slot I need to cut.
I did make the bridge-holding adjustment slots a little longer than called for in the hopes I can adapt this for smaller bridges, i.e., ukuleles.
One word about McMaster-Carr. The place is amazing. There is nothing they don't have in terms of fasteners, tools, material, any kind of hardware - you name it. I bought the bolts and knobs for this project there. Their web site is also incredibly well organized - it's mind-boggling given the thousands of items they sell. Very highly recommended!