Here is the way I round my musky baits and it works great. There is a rubber sheet material that is manufactured in many different patterns and colors. It all has holes molded into the sheet with several patterns available. This material is sold in hardware stores as toolbox liner. You can also buy it at department stores or at the dollar stores where is sold as shelf liner for your kitchen cabinets. You can also buy it in the form of placemats for your kitchen table or coasters for your beverage container. Now, cut out a section of the rubber sheet material that is 3 to 4 times bigger that the biggest lure you make. Next, glue that piece to a board with contact cement. (It is important to glue the rubber sheet to the board). I use water based contact cement so it does not dissolve the rubber. Now, you have a very "grippy" surface to lay your baits on while you round the edges with your router. It is amazing how that rubber sheet holds the bait with just friction. This is very safe and quick and allows you to keep both hands on the router. I usually run 1 screw through the rubberized board into the work bench to keep the board from sliding around. I originally bought this stuff because of the interesting pattern of holes in the sheet. The stuff sold as shelf liner has just the right hole pattern to make an excellent walleye pattern if you use the right paint combo.