I have corian countertop that I need to cut 3 inches off the back end in order to fit it onto the cabinets in my kitchen.. My question is that I am going to use a router with a 1nich straight bit to make the cut.. Do I use the router or a circular saw and how do I glue the waste to the gaps that will remain after I make the cut? Thanks

Using a router is better than a circular saw.

Glue the waste? Are you talking about gluing pieces back on? There is a special Corian glue that Dupont makes and you can't buy it unless you're certified by Dupont. Well, that's how it was years ago when I worked for them. You may get lucky and be able to buy some from a place that builds or installs Corian counters.

Go to Seaming Corian® - art specialties international, inc. You should find all of the information you need there. They will also answer any questions you may have.