I see no downside to double runners unless the saw table's slots are not parallel. As long as the runners move smoothly without any slop, there's no downside that I can think of. Only run runner on a sled like I made would likely result in deflection if there's any resistance to the forward movement to the side. But that design might be better for a panel cutting sled...
That said, I truly miss my slider when it comes to stuff like this and am impatient for being able to get a shop building up and buy another sliding table saw once I have room for it.
Last edited by Jim Becker; 10-19-2021 at 12:29 PM.
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The most expensive tool is the one you buy "cheaply" and often...