Here is the part I am working on. Starting off as a solid, will eventually thin to create sheet metal weldment. Anyway, I am trying to remove this triangular piece of material. I tried creating a 3d sketch thinking I could use extruded cut but the 3d sketch does not seem to be recognized so I thought maybe I could cut across a plane, so I created one. Anyway, what is the best way to remove this sliver of material. Attached is a pic of my screen. using SW2011

Thanks,