table plate insert purpose
Hi, I am about to make a router table and am looking at building a table plate to hold the router. I was wondering what the purpose of the inserts on the plates are. I realize they make the space between the bit and the plate smaller, but what prupose does this serve, (cooling, saw dust reduction in router compartment). If I made the plate with a hole just big enough for my largest router bit, would that be sufficient to use without an insert? My largest bit is about 2" diameter. I am new at this and was just wondering if the insert was really needed for an important purpose.