Holley/Demon Carb stumble

I don't see anything obviously wrong with it.
Very similar to the one in the thread except maybe
Looks like it comes blank, so you'll need to drill set screws or buy the pre-drilled screws before using it.
Some have a bleed screws that are wide at top - like a jet, instead of bottoming out like a set screw.
Otherwise I think the restrictors are are mostly interchangable.