Todd those are some good links, I never saw the one from Bruce in 2005.
I like to keep traps simple, use zip ties and make a cylinder out of plastic mesh from Lowes, shape your cone and zip tie into the cylinder, put mesh over the other end and just tie the top part so that you can flip it up, use tiny bungees to hold the door shut. I used a wood hoop from wally world craft dept. to help keep the round shape.
