Took a weekend getaway up to the high desert. Beautiful weather, good friends, and all that. Time to mount the fence. I use 1/4-20 t-bolts, washers and nuts.
I counter bore the top of the fence to allow me to reach the nuts with a nut driver. The through hole is 1/4" for a tight fit on the bolt.
I then use the fence and a long bit to make a dimple for each hole position on the base. These are just deep enough to use for registration.
Using some outboard support I drill the 3/8" through holes in the sled base at each position.
I then flip the base and drill overlapping Forstner holes to make an oval. This oval in combination with the 3/8" through hole lets the t-bolt do this.
With each of the four holes having this much adjustability I can align the fence easily.
The t-bolts come up through the bottom. The heads are recessed into the ovals so they clear the saw's table.
I slip the fence on, mark for the ZCI using the sled's base ZCI cutout as a layout. I cut the ZCI slot in the fence and set a sacrificial insert into it. I am using a couple of business cards to center the position. Many of my sleds use the same fence inserts screw pattern.
So close. The next steps are critical and I am burned out ;-)
I will pick it up in the morning.