Nice.

Professional carpenters can make incredibly straight and accurate cuts following a chalk line by eye. I'm getting better, perhaps my sensuous nature, but my cuts always look, more or less, like a snake. I use a cut guide for anything but wood butcher cuts.

Either the straight edge of a piece of lumber. Or a DIY cut guide. Last I made was a very straight piece of 1 by 3 I glued and tacked to a piece of quarter-inch plywood. I then cut the plywood to the final size by running my saw down each sides. The result is a reliable cut guide custom made for that particular saw.

Not quite as slick as your guide with its sled. But workable, cheap and something I can make on my own on a job.