bj
You could make one narrower at the bit end so tighter curves can be routed with the pattern bit.
My dust collection pulls in at the insert, so I routed a grove on the bottom to the vacuum.
Very useful & adds some safety features also.
Anyone who makes one will need to modify & adjust the principle to their router table.
Niece wrecked her truck on the way to Fairbanks. So we loaded up her stuff & drove her there. Roads bad almost all the way (snow/ice) slow trip. On the way back roads better since the sun now has heat it is drying out the roads more each day. More daylight every day (gaining about 6 min/day) Got to take my granddaughter to Santa Claus House in North Pole Alaska. It was closed though Santa must have bee on vacation somewhere warm) but the reindeer were out.
Great scenery & saw lots of caribou, some moose, coyotes, eagles etc