Thinking more about it Schmitt's concept is better in a number of ways. But perhaps we LR32 people can have it both ways. We can adapt our holey rails and sleds into a fixed system solution.
We just utilize the holes at each end of the holey rail where the linear stop goes! Build a big U shaped thing like Schmitt's with holes in the arms just like he did. We mount pins in the last hole at each end of the rail. Bingo!
If I was starting from scratch I might be inclined (probably be inclined?) to just go with the Schmitt solution. But I'm not starting from scratch. I've got several hundred invested in my LR32. Plus I have the finest mid-size router on the planet which plunges so easy and smooth. Heck, if you just give it a stern look from across the room it bores a hole.
Here's a rough diagram - not to scale.