My question is "Why a sled at all?"
How about a sturdy fence attached to the miter gauge that extends to both sides
the blade, like the front fence of a sled - just without any bottom. Set up the
stop block like you mentioned, and as you cut, you end up pushing a train of cut
pieces off the back of the saw. I make sure I push the offcut past the blade
when I do this. You can put a "box" on the fence to cover the blade if desired,
again similar to a sled.

Just a clarification - this is 1/4" ply cut into 3" x 11" pieces?
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JeffB
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