Dimitri,
I have made router baseplates for several of my routers (both DeWalt and Porter Cable). You can make them any size/shape, and out of any stable material. I generally use Lucite which you can get in sheets at any home center store. It's usually 1/4 inch thick, and can be cut with table saw, bandsaw, jigsaw, et. Just cut the base the size and shape you need for the 621, mark the location of the screw holes, and drill and countersink the holes into the lucite.
Gerry
I have made router baseplates for several of my routers (both DeWalt and Porter Cable). You can make them any size/shape, and out of any stable material. I generally use Lucite which you can get in sheets at any home center store. It's usually 1/4 inch thick, and can be cut with table saw, bandsaw, jigsaw, et. Just cut the base the size and shape you need for the 621, mark the location of the screw holes, and drill and countersink the holes into the lucite.
Gerry
