I'm very happy with my Grizzly 691. I messed around with different ways to improve the over the table dust collection. None worked as well as I liked. I made a zero clearance insert (strangely not pictured here). I bought a SawStop blade guard and retrofitted it to the Grizzly spliter (pretty easy). made a reducer out of of plastic fittings and ran a 4" hose to it from my ceiling. This works nice.
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